21Sorry，I am too busy now. If I（）time，1 would certainly go for an outing with you.
A.have had
B.had had
C.have
D.had
开始考试练习点击查看答案22——（）you interrupt now? Can't you see I'm on the phone?——Sorry Sir, but it's urgent.
A.Can
B.Should
C.Must
D.Would
开始考试练习点击查看答案23 You might just as well tell the manufacturer that male customers（）not like the design of the furniture.
A.must
B.shall
C.may
D.need
开始考试练习点击查看答案24Don't handle the vase as if it（）made of steel.
A.is
B.were
C.has been
D.had been
开始考试练习点击查看答案25 I'm going to Europe on vacation together with John if I（）find the money.
A.can
B.might
C.would
D.need
开始考试练习点击查看答案26I（）use a clock to wake me up because at six o'clock each morning the train comes by my house.
A.couldn't
B.mustn't
C.shouldn't
D.needn't
开始考试练习点击查看答案27If we（）adequate preparations，the conference wouldn't have been so successful.
A.haven't made
B.wouldn't make
C.didn't make
D.hadn't made
开始考试练习点击查看答案28We lost our way in that small village，otherwise we（）more places of interest yesterday.
A.visited
B.had visited
C.would visit
D.would have visited
开始考试练习点击查看答案29——Happy birthday!——Thank you! It's the best present I（）for.
A.should have wished
B.must have wished
C.may have wished
D.could have wished
开始考试练习点击查看答案30There are eight tips in Dr.Roger' s lecture on sleep，and one of them is:（）to bed early unless you think it is necessary.
A.doesn't go
B.not to go
C.to going
D.don't go
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