问题
We_______onthis project for four hours. Let’s have a rest.
A:are working
B:have been working
C:worked
D:had worked
B:have been working
C:worked
D:had worked
正确答案是：
同类题型
For a moment nothing happened. Then ________ all shouting together.[ ]
I________a training course in Hangzhou to study English in the coming summer vacation.[ ]
My father likes ______ books in theevening. He doesn’t often ______ TV.
______ my husband again and againnot to smoke , but I can’t ______ him
－Why does theriver smell terrible－Because largequantities of water______．