33. We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.（2008-天津）
A. since B. if
C. unless D. until
34. Don’t promise anything _____ you are one hundred percent sure. （2008-浙江）
A. whether B. after
C. how D. unless
35. I hope you’ve got your own car, if you haven’t we may have to hire one.（2008-延考）
A. because B. so that
C. ever since D. when
36. ---Where’s that report?
---I brought it to you ____ you were in Mr. Black’s office yesterday. （2007-北京卷）
A. if B. when
C. because D. before
37. Pop music is such an important part of society ______ it has even influenced our language.
（2007-上海）
A. as B. that
C. which D. where
38. Leave your key with a neighbor ___ you lock yourself out one day.（2007-北京卷）
A. ever since B. even if
C. soon after D. in case
39. work. （2007-福建）
A. when B. before
C. since D. that
40. Most birds find it safe to sleep in the trees, but ______ they have eggs or young chicks, they
don’t use a nest. （2007-湖南）
A. why B. how
C. unless D. where
41. He was told that it would be at least three more months he could recover and return
to work. （2007-江西）
A. when B. before
C. since D. that
42. We had to wait half an hour______ we had already booked a table.（2007-辽宁）
A. since B. although
C. until D. before
43. I won’t call you, ______ something unexpected happens.（2007-全国Ⅰ）
A. unless B. whether
C. because D. while
44. _____ he had not hurt his leg, John would have won the race.（2007-全国卷II）
A. If B. Since
C. Though D. When
45. Small sailboats can easily turn over in the water ____ they are not managed carefully. （2007-
上海）
A. though B. before