Experts think we won’t have clean water to drink unless something_______ soon, but much remains_______ about environment protection.

A. would be done; doing                                B. is done; to be done    

C. will be done; to do                                    D. is done; to do

       Recently Mr. Baker finds his daughter quite different from________ she used to be.

       A. when                             B. that                          C. which                     D. what

　　　 ---You haven’t fully recovered, have you?

　　　 ---No. If only I _________ the doctor’s advice.

　　　 A. followed B. had followed C. should follow D. were to follow

       ---It’s a pity you didn’t come to our party yesterday evening.

       ---I’d like________, but I had to take care of my sick mother.

       A. to                           B. to go                        C. to have                     D. going

       ---A girl is asking to see you. _________she come in or stay outside, waiting?

       ---Let her in.

       A. Must                        B. Will                          C. Can                         D. Shall

       _________she is a likeable girl she can be extremely difficult to work with.

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

　　　 ---Andy has been admitted to Harvard University.

　　　 ---He _________hard for long to realize his dream.

　　　 A. worked B. has worked C. was working D. has been working

       ---The new book didn’t ________ teenagers.

       ---Probably because the author employed too many scientific terms in it.

       A. apply to                   B. pick up                     C. appeal to                  D. call on

       I’m afraid you will have to pay an extra amount to _________ the cost of insurance.

       A. cover                     B. spend                      C. fill                           D. offer

       A White House spokesman said that we need a foreign policy that is more___________.

       A. religious                   B. vacant                      C. punctual                   D. flexible