At night, bats fly through the air, catching hundreds of insects and other small animals. But during the day, they hardly move at all. Instead, bats pass the time hanging upside down from a secret spot.

There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can’t fly into the air from the ground. Their wings don’t produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can’t run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight.

During the hours when most enemies are active, bats gather where few animals would think to look and most can’t reach. This allows them to disappear from the world until night comes again. There’s also little competition for these resting spots, as other flying animals don’t have the ability to hang upside down.

Bats have a unique physiological adaptation that lets them hang around this way without using any energy. For you to hold your fist around an object tight, you contract（紧缩）several muscles in your arm, which are connected to your fingers by tendons（腱）；as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat’s talons（爪）close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn’t have to do anything to hang upside down.

1.Bats hang upside down because________．

A. they haven’t developed a pair of strong claws   B. they can’t start to fly from the ground directly

C. they have no hind legs to support their body    D. they can’t find quiet places to stay during the day

2.The third paragraph tells us that bats’ hanging upside down_______.

A. is to save their energy for night movement      B. is a way to fight against flying animals

C. is a great way to hide from danger             D. is a skill to compete for the flying places

3.Why can bats hang upside down easily?

A. Because their upper body is light.

B. Because they have strong muscles.

C. Because their talons are linked to muscles tightly.

D. Because their tendons are linked to their upper body.

4. What is the passage mainly about?

A. The living habits of bats.             B. How and why bats hang upside down.

C. The importance of bats’ hanging upside down.    D. How bats use their energy at night.

If cars had wings, they could fly and that just might happen, beginning in 2012．The company Terrafugia, based in Woburn, Massachusetts, says it plans to deliver its carplane, the Transition, to customers by the end of 2012．
“ It's the next ’wow’ vehicle,” said Terrafugia vice president Richard Gersh．“Anybody can buy a Ferrari, but as we say, Ferraris don't fly．”
The car plane has wings that unfold for flying－a process the company says takes one minute-and fold back up for driving． A runway is still required to take off and land．
The Transition is being marketed more as a plane that drives than a car that flies, although it is  both．The company has been working with FAA to meet aircraft regulations, and with the National High way Traffic Safety Administration to meet vehicle safety regulations．
The company is aiming to sell the Transition to private pilots as a more convenient and cheaper way to fly．They say it saves you the trouble of trying to find another mode of transportation to get to and from airports: You drive the car to the airport and then you're good to go．When you land, you fold up the wings and hit the road．There are no expensive parking fees because you don't have to store it at an air port-you park it in the garage at home．
The carplane is designed to fly primarily under 10,000 feet．It has a maximum takeoff weight of 1,430 pounds, including fuel and passengers．Terrafugia says the Transition reduces the potential for an accident by allowing pilots to drive under bad weather instead of flying into marginal（临界） conditions．
The Transition's price tag: $ 194,000．But there may be additional charges for options like a radio, transponder or GPS．Another option is a fullplane parachute．
“If you get into a very awful situation, it is the necessary safety option,”Gersh said．
So far, the company has more than 70 0rders with deposits． “We're working very closely with them,
but there are still some remaining steps, ” Brown said．
【小题1】We can learn from the first paragraph that         ．

If cars had wings, they could fly and that just might happen, beginning in 2012. The company Terrafugia, based in Woburn, Massachusetts, says it plans to deliver its car-plane, the Transition, to customers by the end of 2012.
“It’s next ‘wow’ vehicle,” said Terrafugia vice president Richard Gersh. “Anybody can buy a Ferrari, but as we say, Ferraris don’t fly.”
The car-plane has wings that unfold for flying-a process the company says takes one minute-and fold back up for driving. A runway is still required to take off and land.
The Transition is being marketed more as a plane that drives than a car that flies, although it is both. The company has been working with FAA to meet aircraft regulations, and with the National Highway Traffic Safety Administration to meet vehicle safety regulations.
The company is aiming to sell the Transition to private pilots as a more convenient and cheaper way to fly. They say it saves you the trouble from trying to find another mode of transportation to get to and from airports: You drive the car to the airport and then you’re good to go. When you land, you hold up the wings and hit the road. There are no expensive parking fees because you don’t have to store it at an airport-you park it in the garage at home.
The car-plane is designed to fly primarily under 10,000 feet. It has a maximum takeoff weight of 1,430 pounds, including fuel and passengers. Thrrafugia says the Transition reduces the potential for an accident by allowing pilots to drive under the bad weather instead of flying into marginal(临界的) conditions.
The Transition’s price tag: $194,000. But there may be additional charges for options like a radio, , a transponder or a GPS. Another option is a full-plane parachute.
“If you get into a very awful situation, it is the necessary safety option.” Gersh said.
So far, the company has more than 70 orders with deposits. “We’re working very closely with them, but there are still some remaining steps,” Brown said.
【小题1】We can learn from the first two paragraphs that _________.

What I noticed first about my new parrot, Chico, was that he couldn’t fly. His wings had been cut short and he was stuck on the   1  just like us humans. When the weather turned nice, I took Chico outside. I sat him on a branch of a tree, hoping to make him   2 . At first he seemed   3 . He walked back and forth on the branch looking anxious or nervous. He didn’t even flap his wings in an attempt to fly. Somehow he knew he was   4 .
One day Chico got especially excited . He paced back and forth and made an incredible amount of   5 . Then all of a sudden he stopped and let out an even louder scream. He started   6  flapping his wings for the first time ever － then he lifted off the   7  like a space shuttle! I was amazed and   8  . Little did I know his feathers had been growing back, and Chico had been   9  until the moment was ripe for escape!
Two days later Chico   10  . First I tried to trick him back with food, but he would not come near me. Then I took his   11  and put it away—still he would not come. Finally, I made him a firm promise that I would let him   12  every day the weather was nice if he did come back.   13  , he flew onto my shoulder.
From that day on, whenever the weather was good I would let him out early and he would fly around and be back before dark. The   14  lasted for two months before suddenly Chico became   15 . The vet said that he had been infected with a disease from the pigeons in the neighborhood. Within a few days he died.
I was very sad. The   16  crossed my mind that if I had not set him free to fly, he would be still alive. But what   17  is there in being a bird if you can’t fly?
Chico made his first break for   18  on a late Monday afternoon in April. When will you make yours? You too can take a   19  when the conditions are right, knowing you too, in your own way, were built to fly. If you don’t    20 , what will be the purpose of your life?

If cars had wings, they could fly and that just might happen, beginning in 2012．The company Terrafugia, based in Woburn, Massachusetts, says it plans to deliver its carplane, the Transition, to customers by the end of 2012．

“ It's the next ’wow’ vehicle,” said Terrafugia vice president Richard Gersh．“Anybody can buy a Ferrari, but as we say, Ferraris don't fly．”

The car plane has wings that unfold for flying－a process the company says takes one minute-and fold back up for driving． A runway is still required to take off and land．

The Transition is being marketed more as a plane that drives than a car that flies, although it is  both．The company has been working with FAA to meet aircraft regulations, and with the National High way Traffic Safety Administration to meet vehicle safety regulations．

The company is aiming to sell the Transition to private pilots as a more convenient and cheaper way to fly．They say it saves you the trouble of trying to find another mode of transportation to get to and from airports: You drive the car to the airport and then you're good to go．When you land, you fold up the wings and hit the road．There are no expensive parking fees because you don't have to store it at an air port-you park it in the garage at home．

The carplane is designed to fly primarily under 10,000 feet．It has a maximum takeoff weight of 1,430 pounds, including fuel and passengers．Terrafugia says the Transition reduces the potential for an accident by allowing pilots to drive under bad weather instead of flying into marginal（临界） conditions．

The Transition's price tag: $ 194,000．But there may be additional charges for options like a radio, transponder or GPS．Another option is a fullplane parachute．

“If you get into a very awful situation, it is the necessary safety option,”Gersh said．

So far, the company has more than 70 0rders with deposits． “We're working very closely with them,

but there are still some remaining steps, ” Brown said．

1.We can learn from the first paragraph that         ．

A．carplanes will be popular in 2012

B．people might drive a carplane in 2012

C．both Transition and Ferrari can take off and land

D．Richard Cersh is the vice president of Massachusetts

2.It takes the carplane one minute to          ．

A．fold and- unfold its wings                 B．unfold wings for flying

C．land in the airport                       D．meet flying safety regulations

3.According to the passage,  which of the following is NOT true?

A．The carplane needs a runway to take off and land．

B．To meet aircraft regulations, the company has been working with FAA．

C．The carplane may fly as high as normal planes．

D．People can park the carplane in the garage at their home．

4.The underlined word "it" in the last but one paragraph refers to          ．

A．the radio                              B．the transponder

C．the GPS                               D．the fullplane parachute

5.What's the best title for the passage?

A．Cars With Wings May Be Just Around The Comer

B．Which To Choose: A Ferrari Or A CarPlane?

C．A More Convenient And Cheaper Way To Fly

D．Cars With Wings Can Fly As Fast As Plane