单项选择题

— Where ______
— I got stuck in the heavy traffic. I ______ here earlier.

A. did you go; had arrived
B. have you been; would have been
C. were you; would come
D. are you; was
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单项选择题
— Has Jack finished his homework yet — I have no idea; he ______ it this morning.
A. was doing
B. had been doing
C. has done
D. did
单项选择题
______ all over the hill and around the lake are wild flowers of different kinds.
A. To grow
B. Growing
C. Grown
D. Grow
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