Mr.Smith is coming to Beijing next Sunday.By the time he arrives we ________ here for ten days. A.have been staying B.have stayed C.shall stay D.will have stayed
Although she ________ law for only a little over eight years, Florence Allen became in 1992 the first woman to sit on a state supreme court. A.will practise B.had practised C.practises D.has been practising
The officials concluded from a analysis of the traffic accident that ________ by human error. A.they were caused B.it was caused C.it had been caused D.they had caused
Susan is on vacation in Florida, and she doesn’t take much money with her.So, by the end of her vacation, she ________ all her money. A.has spent B.will be spending C.had spent D.will have spent
After Smith ________ for half an hour, he came to the conclusion that Helen was not coming. A.has been waiting B.waited C.has waited D.had been waiting
He is so determined!He ________ on the problem for two hours, and he will go on with it until he works it out. A.works B.worked C.is working D.has been working
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