问题

We should go out and stretch our legs. We ____ all day. [ ]
A: had sat
B: have been sitting
C: have sat
D: was sitting
B: have been sitting
C: have sat
D: was sitting
正确答案是:
同类题型
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Where is Tom —-He’s left a(n) _____ saying that he has somethingimportant to do.