41The field research will take Joan and Paul about five months; it will be a long time（）we meet them again.
A.after
B.before
C.since
D.when
开始考试练习点击查看答案42In some places women are expected to earn money（）men work at home and raise their children.
A.but
B.while
C.because
D.though
开始考试练习点击查看答案43He was told that it would be at least three more months（）he could recover and return to work.
A.when
B.before
C.since
D.that
开始考试练习点击查看答案44Don't promise anything（）you are one hundred percent sure.
A.whether
B.after
C.how :
D.unless
开始考试练习点击查看答案45Reality is not the way you wish things to be, nor the way they appear to the（）the way they actually are.
A.as
B.or
C.but
D.and
开始考试练习点击查看答案46I'd like to study law at university（）my cousin prefers geography.
A.though
B.as
C.while
D.for
开始考试练习点击查看答案47（）he has limited technical knowledge，the old worker has a lot of experience.
A.Since
B.Unless
C.As
D.Although
开始考试练习点击查看答案48Please remind me（）he said he was going. I may be in time to see him off.
A.where
B.when
C.how
D.what
开始考试练习点击查看答案49The cost of living in Glasgow is among the lowest in Britain,（）the quality of life is probably one of the highest.
A.since
B.when
C.as
D.while
开始考试练习点击查看答案50He was about halfway through his meal（）a familiar voice came to his ears.
A.why
B.where
C.when
D.while
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