16、 Victor apologized for ____ to inform me of the change in the plan .  

A. his being not able    B. him not to be able  

C. his not being able    D. him to be not able

15、Mum had to cook different courses for Mike , for his tastes are      .

A. various        B. variety       C. vary          D. varied

14、     , his discovery has created a stir in scientific circles.

A. As is believed                         B. It is believed            

C. He is believed that                   D. Who believed that

13、The      marine organisms take      the density of water is great.

A. use ,  of                                          B. advantage, with       

C. disadvantage,  of                             D. advantage, of

12、I tried to call on you last week but your dog simply      not let me come throgh the gate.

A. could               B. would               C. might                 D. should

11、We agreed to accept               they thought was the best tourist guide.

A. whoever                                       B. whomever       

C. whatever                                      D. whichever

10、He has put up a private company, but he     in the college for about 15years.

A. works                                           B. has been working

C. worked                                         D. had worked

9、----Why didn’t you go fishing with your friends yesterday ?

----Well, fishing is a hobby which       a great deal of patience, which I don’t have .

A. calls in                                             B. calls for           

C. calls up                                            D. calls on

8、Everyone arrived Late at the party, for      reasons.

A. a number of                                  B. a great deal of  

C. a variety of                                   D. large guantities of

7、      by the rising price of gas, many car owners use their cars less frequently.

A. Driven                                                 B. Being driven             

C. To drive                                              D. Having driven