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II. 单项选择
21.I failed in the last exam and only then __________ the importance of studies.
A. I realized B. I had realized C. had I realized D. did I realize
22.The farmers near the hotel ______horses by the day.
A. find out B. give out C.let out D. break out
23. The _______ Prime Minister expressed his satisfaction with his talks, _______ that he had enjoyed his stay here.
21.I failed in the last exam and only then __________ the importance of studies.
A. I realized B. I had realized C. had I realized D. did I realize
22.The farmers near the hotel ______horses by the day.
A. find out B. give out C.let out D. break out
23. The _______ Prime Minister expressed his satisfaction with his talks, _______ that he had enjoyed his stay here.
