21、Since Mr. Smith was an experienced designer, we asked him to _______ us in designing a building.

A．consider        B．assist         C．provide         D．offer

20、I know nothing about the young man ______ except that he is from America

A．to defeat        B．defeating         C．defeated         D．be defeated

19、The computer he had had _______ was out of order again, which made him angry.

A．it repair       B．it repaired        C．repaired        D．to be repaired

18、A good story does not necessarily have to have a happy ending, but the reader must not be left_______.

A．unsatisfied        B．unsatisfying        C．to be satisfying         D．being satisfied

17、As a writer _______ the new century, he is popular among the teenagers.

A．belongs        B．belongs to         C．belonging         D．belonging to

16、---Who’s the woman standing over there?

---A teacher and writer ______ to Joseph’s birthday party.

A．is invited        B．who is invited         C．inviting         D．who are invited

15、Finding the little boy _____ to the danger, the mother rushed to take him away.

A．exposed       B．exposing        C．to exposing        D．having exposed

14、Tom felt that he himself, rather than the girls, ________ for the failure of the football match.

A．were to blame                  B．was to blame 

C．were to blamed                 D．was to be blamed

13、--I’m afraid the theory is beyond our understanding, Mr. Black.

--OK. I’ll give you some examples to _________ it.

A．instruct        B．clarify        C．absorb        D．handle

12、---Would you please tell us something about the Group of Eight （G8）?

---Well, G8 is an international organization _____ the richest countries in the world, five of which are quite small and two of which are island states.

A．is consisted of        B．consisting of        C．consists of         D．consisted of