B．whatever; however long

　　C．no matter what; how long time

　　D．no matter how; what a long time

24. ---Where did you get to know her?

---It was on the farm ________ we both once worked in the 1970s.

A． that B. which C. when D. where

25. When an explosion happened in a chemical factory, the police _______the public not to panic.

A. referred to B. got across C. appealed to D. came across

26. Standing among the students _______together with their English teacher.

　　A. is the headmaster B. are the headmaster

　　C. the headmaster is D. the headmaster are

27. - I walked up the stairs all the way to the sixth floor for the interview yesterday.

- You _______ so, because there is a lift.

A. couldn't have done B. shouldn't have done

　　C. needn't have done D. wouldn't have done

28. Unless everyone can give up a little freedom of his own, _______ no one can get along well with others.

A. besides B. otherwise C. however D. instead

29. - Will you study abroad after graduation?

- Haven't decided yet. I ______ about it the whole year.

　　A. have thought B. had thought

　　C. thought D. have been thinking

30. -Do you know whether Alice has finished reading the book Journey to the Center of the Earth?

-Yeah, she told me that she ______ the book twice that week and that she ______ never forget the fantastic story.

A. read; would B. read; will

C. had read; will D. had read; would