A.must
B.mustn‘t
C.have to
D.don‘t have to
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A.that he saw
B.had he seen
C.did he see
D.that he had seen
A.people can do what
B.can people do what
C.people can not do what
D.can‘t people do what
A.it took
B.it takes
C.it is being taken
D.it has been taken
A.has taken
B.has been taking
C.is taken
D.has been taken
A.played
B.play
C.playing
D.plays
A.to work
B.work
C.working
D.worked
A.Bid
B.To bid
C.Bidding
D.To be bidden
A.raising
B.she was raising
C.raised
D.to raise
A.Spending
B.To spend
C.Spend
D.Spended
A.saying
B.to say
C.say
D.said
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