Koalas eat_____ and______.

A．leaf;grass         B．leaves;grasses      C．leaves;grass        D．leaf;grasses

Pandas like eating _____ and elephants like eating ____.

How did ancient people tell time?

◆Natural ways of keeping time

In ancient time，people had to use the sun and the moon to tell time．They got up when the sun came up and worked in the fields until the sun went down．

◆Man-made things

The sand clock is made of two glass balls joined by a narrow neck．The top ball was filled with sand．The sand slowly moved through the neck into the bottom（底部）ball．People knew the time by watching how much sand fell to the bottom hall．People also made the water clock．They made a small hole near the bottom of a pot．when the water in the pot dripped（滴）out，marking（刻度）inside the pot showed how much time passed．

◆Body clocks in living things

Animals' body clock

Animals don't need clocks to know time．They have their body clocks．Birds know when to fly to warmer places before winter．Some animals know when to keep more food for the winter．Some fish know when it's time to move up the river and lay eggs．

Plants' own clock

Plants have their own clocks to keep time．Plants know when to open flowers or when to drop their leaves．

Body clock in human beings

People also have their own body clocks．When we get used to our lives，our body clocks can be very exact．It can tell us when it's time to wake up．It can also tell us when to eat or to go to sleep．

1．How could an ancient farmer know when to go back home from the field in the daytime?

A．By looking at the moon．                         B．By the sand clock or the water clock．

C．By looking at the sun．                               D．By feeling whether tired or not．

2．According to the passage，how can animals know time?

A．They use body clocks．                           B．They ask other animals．

C．They use the sun and the moon．                D．They make something to tell time．

3．How many kinds of living things with body clocks are mentioned here?

A．Two．                B．Three．               C．Four．                   D．Six．

4．In what way is the sand clock the same as the water clock in telling time?

A．Both of them have a neck．

B．Both of them have two glass balls．

C．Both of them can be used only once．

D．Both of them give the time by quantity（数量）．

5．The passage is mainly about _________．

A．man-made clocks                                    B．nature's clocks

C．time and clock                                           D．how people keep time

A cold is a common illness. It often starts with a sore _1_.You sneeze and your nose runs. You usually _2_  a headache ,too ,It 's not a serious illness,but you can feel very_3_.

what should you do when you have a cold?you should have a good rest,It is good __4_a lot of water too.You can __5_and take some medicine.Maybe you can try some Chinese medicine.Chinese medicine is now very__6____all over the world.

Where does Chinese medicine __7_____?A long time ago, When people were not feeling__8____, they find that some plants could make them feel__9_____.They ate the leaves,the roots,the fruit,or the seeds of the plants. Today people make much Chinese medicine__10____those plants.

1.                A．throat          B．hand           C．leg  D．arm

2.                A．give           B．have           C．bring D．find

3.                A．bad            B．happy          C．shy  D．clever

4.                A．drinking        B．drink           C．to drink   D．drinks

5.                A．see a dentist     B．go to a party     C．go to school   D．see a doctor

6.                A．difficult         B．different        C．delicious  D．popular

7.                A．come to        B．come from      C．get up    D．get to

8.                A．sad            B．well            C．tired D．busy

9.                A．better          B．less            C．more D．most

10.               A．to             B．in             C．from  D．on