This noon my boss replied _______ the invitation ______ before he went home.

       A．on; receiving    B．to; received      C．on; accepted     D．to; accepting

In the past, ice used to ______ used to ______ the air in a room.

A．be ;cooling      B．be; cool     C．being; cool      D．being; cooling

Evelyn is supposed to attend church soon, but nobody is sure whether she        or not.

A. does                               B. is                                     C. had                                 D. will

Americans love sports – they love to play them, to watch them on television and to talk about them. But this hobby sometimes has serious results – at least to the players. For example, when people play tennis, sometimes they hurt their elbow and in this way they develop “tennis elbow”. Also it is easy to hurt a knee in a football game. These injures happen while the player is having fun, but they still hurt.

A few months ago, Kathleen Simmons, who loves playing volleyball, hurt her knee in a volleyball game. Her doctor told her that she needed a very difficult operation or she might not be able to play again. She felt very sad and didn’t know what to do.

Then Simmons learned about “video operation”. With the help of this new science in medicine, doctors can now repair many injures and get people back on the playing field and back to their jobs much faster. Simmons found a hospital that was using this new science and went to see the doctor there. The doctors told her the operation could help.

For this operation, her doctor didn’t have to open her knee. Instead he put a very small camera lens(镜头) inside her knee. The lens sent back pictures, which appeared on a television screen. As he worked, he could see the inside of her knee on the TV. With the help of the large pictures on the screen, the doctor knew exactly what to do when he was making the repairs.

Simmons started walking five days after her operation. “My knee hurt a lot the first few days,” she said. “But I felt better very quickly.” Now, six months after her operation, Simmons can do everything she did before her injury. “It feels like a new knee,” she said. “I can even play volleyball again.”

41. “Tennis elbow” means ______.

A. tennis players are easy to hurt their elbow when they play tennis

B. the elbow is suitable for playing tennis

C. all the players should use elbow to play tennis

D. don’t hurt your elbows

42. “Video operation” is ________.

A. a kind of new science in medicine      B. a kind of new TV program

C. a kind of new radio      D. a kind of new lens

43. Although people love sports, many players suffer from ______.

  A. injures      B. operations   C. results D. illness

44. A patient ______________________.

A. could make an operation himself with the help of screen

B. could see the inside of his knee on the TV

C. could put a very small camera lens inside his knee

D. would become better soon after the “video operation”

When I got home, I found the door open, a terrible thought ______ me—had any one broken into the house?

A．beat              B．knocked             C．struck             D．appeared

When you think about math, you probably don’t think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals.

People who solve crimes look for patterns that might reveal (揭示) the identity of the criminal. It’s long been believed, for example, that criminals will break the law closer to where they live, simply because it’s easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it.

But Mike O’Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of a criminal’s home base by combining these patterns with a city’s layout (布局) and historical crime records.

The records of past crimes contain geographical information and can reveal easy targets — that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections are. O’Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal’s patterns change with age. It’s been shown, for example, that the younger the criminal, the closer to home the crime.

Other computer programmers have worked on similar software, but O’Leary’s uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country.

The program is just one way to use math to fight crime. O’Leary says that criminology — the study of crime and criminals — contains a lot of good math problems. “I feel like I’m in a gold mine and I’m the only one who knows what gold looks like,” he says. “It’s a lot of fun.”

49. To find criminals, police usually _________.

A. check who are on the crime scene

B. seek help from local people

C. depend on new mathematical tools

D. focus on where crimes take place

50. O’Leary is writing a computer program that _________.

A. uses math to increase the speed of calculation

B. tells the identity of a criminal in a certain area

C. provides the crime records of a given city

D. shows changes in criminals’ patterns

51. By “I’m the only one who knows what gold looks like”, O’Leary means that he _________.

is better at finding gold than others

is the only one who uses math to make money

knows best how to use math to help solve crimes

has more knowledge of gold than other mathematicians

52. What is the main idea of the text?

A. Math could help police find criminals.

B. Criminals live near where crimes occur.

C. Crime records could be used to fight crime.

D. Computer software works in preventing crimes.

With no ________ to public water, Luki relies on a well for his family’s water needs.

A. way                                           B. passage                          C. access                             D. approach

----_____ I tried many times ,but I still failed in the experiment.

------_____don’t be discouraged ,_______and the problem will be settled.

 A.Having a little effort       B. There being a little effort

 C.If you have a bit  effort    D.A bit more effort

29.-----I _____to go for a walk.

  -----But I_____ going shopping.

A. would like; feel like                      B. feel like; feel like

C. feel like; would like                      D. would like; would like