33. It is quite necessary for us to know the situation ______ a word or phrase is used.

A. in which B. that 　　　　　 C. to which　　　　　　 D. for which

32. - It is said that Li Lei has been taken away by the police.

　 - He ____ the robber. I was with him at that time.

A. must be mistaken as　　　　　　 B. must be mistaken for

C. is being mistaken as 　　　　　 D. must be taken as

31. Gorillas are quiet animals, ____ they can make about 20 different sounds.　　

A. so long as　　　 B. in case　　　　　　　 C. because　　　　　　 D. even though

30. A knot is a joining of two pieces of rope ____ thread.

A. with　　　　　　　 B. because of　 　　 C. of　 　　　　 D. or of

29. The flowers of the American elm tree appear in spring, ____.

A. the leaves are growing long before　　　 B. long before the leaves grow

C. before growing longer the leaves　 　　 D. the growth of leaves is before long

28. -May I take your order now? 　

　 -____.

A. No, I don't have a choice of meat B. Yes, soldiers must obey orders

C. Yes, I'd like a dish of chicken 　　 D. No, my affairs are in order

27. - You have written a book, haven't you?

　 - Yes, it _____ come out in a month.

A. can 　　　　　　　 B. should 　　　　　　 C. maybe　　　　 D. will be

26. - Let's have a drink together. It is said you went to settle in the south.

　 - Yes, it ____ years _____ we met at John's.

　A. is; since　　　 B. was; after　 C. was; before D. is; before

25. With the teachers ____ patiently next term, we're sure to succeed.

A. helping us 　　 B. help us 　　　　　　 C. will help us 　　　 D. to help us

24. - David had an accident and lost his leg.　　

　 - ______ ?

A. Since when has that been　　　　　　 B. For how long has been that　

C. When has that been　　 　　　　　　 D. How long ago was that