--- 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

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

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

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

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

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

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

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

 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

Only a few stand-up comedians have become famous as television and film actors later on in life. _____________ is Billy Crystal.

   A. One such person                       B. Such one person 

   C. A such person                           D. Such person

 As it turned out to be a small house party, we _______ so formally.

   A. needn’t dress up                                          B. shouldn’t   dress up

   C. couldn’t have dressed up                              D. needn’t have dressed up

Fortunately somebody who happened to be passing by called the fire department __________the fire broke out.

A. hurriedly                  B. quickly                   C. immediately        D. shortly