31I hesitated about taking his side________ I knew the whole story.
A.why
B.until
C.than
D.where
开始考试练习点击查看答案32A man escaped from prison last night.It wasn’t long________the guards discovered what had happened.
A.until
B.before
C.since
D.when
开始考试练习点击查看答案33Visitors are allowed in the gardens________that they don, t touch the plants.
A.as long
B.if
C.in case
D.on condition
开始考试练习点击查看答案34You’ll be fined________ you return the books to the school library by this weekend.
A.if
B.until
C.unless
D.provided
开始考试练习点击查看答案35I will pay a visit to my old friend________she comes back from abroad.
A.the time when
B.the moment when
C.the minute
D.on the minute
开始考试练习点击查看答案36Nearly three years of high school had gone by________he finally realized the importance of studying hard.
A.until
B.while
C.before
D.so that
开始考试练习点击查看答案37She didn’t want to go to Africa,________the weather there is too hot.
A.for
B.because
C.since
D.as
开始考试练习点击查看答案38You can fly to London this evening________you don’t mind changing planes in Paris.
A.as long
B.provided
C.although
D.where
开始考试练习点击查看答案39He wrote down Jane’s phone number________he could remember it.
A.as if
B.if
C.so that
D.unless
开始考试练习点击查看答案40Hardly had Jerry got to the office________his wife called him for an emergency at home.
A.when
B.after
C.until
D.than
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