1) how fast......... when the accident happened ? A. are you driving Bwere you.. C. Did you... D. Had.... 2) HE WAS busy ...... his homework. A. to do b . doing c. for doing d.that he was doing

2 câu trả lời

1:b

2:b

1. B: were you driving

=> thì quá khứ tiếp diễn

2. B

=> busy + Ving: bận rộn với việc gì

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