9. Great changes ________ in the city since 1979.

A. have taken place               B. have taken the place

C. have been taken place          D. have been happened

8.－How do you like our restaurant?

－I couldn’t have found a ________ one.

A. good          B. better        C. best         D. fine

7. Don’t try to cheat the taxman(税务人员); you’ll never ______it.

A. get out of         B. get into       C. get along       D. get away with

6. ―Who______ it be that is knocking at the door?  

   ―It ______ be Father, but I’m not sure.

A. can; must                       B. can; may       C. must; can                         D. may; must

5. He apologized ________ late.

A. to his teacher to arrive                 B. to his teacher for arriving

C. at his teacher to arrive                 D. at his teacher for arriving

4.  －Could I ask you a rather personal question?

－________.

A. Yes, don’t worry                      B. Of course, go ahead

C. Yes, help yourself                     D. Of course, why not

3. He ______ on the bed_____ to his parents that blackbirds had_____ their eggs on Mars.

A. lay; lying; lied                        B. lied; lied; lied 

C. laid; laid; laid                       D lying; lied; laid

2. Children’s curiosity may _____________ many useful inventions.

A. lead to           B. take place      C. gather in         D. bring away

1. ―I want to know if I        smoke here.

―No, you       .Could you see the sign “NO SMOKING” there?

A. can; needn’t             B. must; can’t        C. shall; won’t              D. may; mustn’t

4、（共8分）

（1）染色单体（2分）

（2）核ＤＮＡ（２分）

（3）染色体　（２分）

（4）８　　　（２分）