30．---- I rang you at about ten, but there was no reply.

----Oh, that was probably 　　　　I was seeing the doctor.

A. when　　 B. why　　 C. what　　 D. that

29．　　　 　surprised me most was 　　　　　he was too late for the important meeting, for he was chairman of　 it.

A. What; why　 B That; how C. What; how　 D. That; why

28．　　 　much advice I gave him, he did exactly what he wanted to.

A. How　 B. whatever　 C. No matter　 D. However

27．It is a common belief 　　　teenagers today know about computers and are familiar_______ using them in all aspects of life.

A. that; out　 B. what; with　 C. that; with　 D. what; about

26．　　　 　Sarah said showed that she didn’t decide 　　　　to say or not.

A. What; if　 B. How; Whether C. How; if　 D. What; whether

25．The three of them agreed that 　　　　arrived first should save seats for the other two.

A. who　　 B. whenever　 C. however　　 D. whoever

24．You have not yet answered my question　　　 　I can join in the party tonight.

A. whether　 B. if　 C. which　 D. that

23．　　 　would like to devote his whole life to his country should go 　　　　there are kinds of difficulties.

A. Who; somewhere　 B. Whoever; where C. Whatever; anywhere D. Who; there

22．---Do you really believe there is human race in outer space?

---- So far there is no proof 　　　　people from other planets do exist.

A. which　 B. how　 C. what　 D. that

21．I kept looking at the man, wondering 　　　.

A．whether I have seen him before

B．where I had seen him before

C．that I had seen him before

D．when I had seen him before