A. did the teacher found B. the teacher found

C. did the teacher find D. had the teacher found

21. _____the plane.

A. Flew down B. Down flew C. Down was flying D. Down fly

22. Hardly _____ when the bus suddenly pulled away.

A. they had got to the bus stop

B. they got to the bus stop

C. did they get to the bus stop

D. had they got to the bus stop

23. ______ I had time, I would have run round that lake again.

A. If B. Unless C. Had D. When

24. Not only ______ a promise, but he also kept it.

A. had he made B. he had made

C. did he make D. he makes

25. ______ I would see you here.

A. Little I dreamed B. Little do I dream

C. I dreamed little D. Little did I dream

26. There ____.

A. come they B. they come C. they are come D. they will come

27. ______ that he could not speak for a long time.

A. So frightened was he B. So frightened he was

C. Was he so frightened D. Frightened was he

28. Only when class began ______ that he had left his book at home.

A. will he realize B. he did realize C. did he realize D. should he realize

29. Only when you have finished your homework _____ go home.

A. can you B. would you C. you will D. you can

30. Seldom ____ any mistakes during my past few years of working here.

A. would I make B. did I make C. I did make D. shall I make