3、Smoking harms you.(同)　　 Smoking ______ ______ to you.

2、Both his sister and my brother have been to the USA.(同)

　　　 ______ ______ his sister ______ ______ my brother ______ been to the USA.

1、His father became a teacher in 1980.(同)

His father _______ ________ a teacher since 1980.

We know that trees are useful in our everyday life. They 　(1)　 us many things, such as wood, oxygen, rubber,　 medicine and many other things. They can (2) tell us a lot about our climate(气候). The following are the reasons(理由).

If you (3) a tree, you can see that it has many rings (年轮). Most trees grow one new ring (4) year. Because of this reason, we know (5) a tree is. A tree over a hundred years old means that it has more than a hundred (6). When the climate is dry or very cold, the trees do not grow very much and their rings are usually (7). When it is wet and warm, the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this means that the (8) changed suddenly. If we look at the rings on this tree. we can learn about the (9) for a hundred years. We can see (10) our climate is changing today.

1、A.tell　　　 B.ask　　 C.give　　 D.get　　　　　　 2、A.not　　　　　　 B.too　　 C.to　　　　　　　 D.also

3、A.cut across　 B.climb up　　 C.walk past　 D.look　 at

4、A.every　 B.many　　　　 D.the first　　 D.from

5、A.ehow big　 B.how long　 C.how old　　 D.how much

6、A.trees　　 B.leaves 　　　 C.people　　　 D.rings　 7、A.big　 　 B.thick　 C.small　　　　 D.thin

8、A.climate　　　 B.trees　　　　　 C.rings　　　　　 D.animal

9、A.people B.things C.climate　　　 D.life　　 10、A.how　　　　 B.why　　　　　 C.when　　　　 D.while

9、Don’t play football in the street. It’s ______(danger).　　　 10、Please tell me the ______(true) of it.

8、Every year. Mount Tai attracts large numbers of ______(tour) to Tai’an.

6、He did the work with ______(please).　 6、They have seen the file ______(two).

4、There used ______(be) an old museum here.　 5、Tom’s mother______ (die) in an accident.

3、I ______ (finish) my homework, let’s go and play games.

2、Jim didn’t stop______(have) a rest, He went on ______(work).