21、     you lose the paper document，sign in www.sohunt.com，     you might download all you need．

A．If；which        B．So long as；what    C．In case；where            D．Even if；as

20、---I' m sorry,  I shouldn't have been so rude to you.

----You___________ your temper but that's OK

A．did lose                 B. have lost             C. had lost               D. were losing

19、The role change of husband to father, although difficult, doesn't seem so great as_______ of wife to mother.   

A. that             B. one                    C. this                   D. those

18、--- Have you made a phone call to Mike?

---The line is always busy. I can't _________.

A. get along             B. get through                C. get over               D. get in

17、__________ maths can be difficult to learn it is very useful to develop your thinking

   A. While                      B. Since                    C. As                        D. For

16、________ he is a famous medical expert , you’d better follow his advice.

A. Even if           B. In case                 C. Now that         D .So that

15、With so many people _______________ by sending E- mails every day, it will become more and more important to have a good knowledge of the Internet.

   A. communicating         B. communicated       C. communicate        D. to communicate

14、When he came back three hours later , they were still sitting on the sofa , _______________ in conversation.

   A. absorbing               B. absorbed            C. to absorb             D. to be absorbed

13、On the long flight to Hawaii , the memory of my childhood ,____________I was my father’s Shadow , came flooding back.

   A. as                         B. when                    C. while                     D. where

12、 My father warned me that I had to go back before 10 o’clock _________ he would punish me if I was late.

   A. also                        B. then                      C. that                      D. 不填