题目

Only then __________ how much damage had been caused. A. she realized       B. she had realized C. had she realized D. did she realize 答案：D。 解析: 当“only+状语”置于句首时，其后句子要用倒装语序，如：Only then did he realize that he was wrong. 到那时他才意识到他错了。Only in this way are you able to do it well.  你只有用这种方法才能把它做好。

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