摘要： Only when we saw the photos about the air crash how terrible it was. A had we known B we had known C did we know D we knew
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Only when we saw the photos about the air crash ________ how terrible it was.
[ ]
A. had we known
B. we had known
C. did we know
D. we knew
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B. we had known
C. did we know
D. we knew
Only when we saw the photos about the air crash ________ how terrible it was.
[ ]
A. had we known
B. we had known
C. did we know
D. we knew
查看习题详情和答案>>
B. we had known
C. did we know
D. we knew
Only when we saw the photos about the air crash_____ how terrible it was.
A had we known B we had known C did we know D we knew
查看习题详情和答案>>