1、The crazy fans ________ patiently for two hours and they would wait till the movie star arrived
A.were waiting
B.had been waiting
C.had waited
D.would wait
2、This machine is very easy ________
A.operating
B.to be operating
C.operated
D.to operate
3、Thank you for all your hard work last week,I don't think we ________ without you
A.can manage
B.could have managed
C.could manage
D.can have managed
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