摘要： Only when he returned from the exchange program how much he enjoyed it. A. he realized B. he had realized C. did he realize D. had he realized
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Only when he returned from the exchange program ________ how much he enjoyed it.
[ ]
A. he knew
B. he had known
C. did he know
D. had he known
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B. he had known
C. did he know
D. had he known
Only when he returned from the exchange program ________ how much he enjoyed it.
[ ]
A. he knew
B. he had known
C. did he know
D. had he known
查看习题详情和答案>>
B. he had known
C. did he know
D. had he known
Only when he returned from the exchange program ________ how much he enjoyed it.
A．he realized B．he had realized
C．did he realize D．had he realized
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