问题
选择题
Only then ______ how much damage had been caused.
A．had she realized
B．she realized
C．did she realize
D．she had realized
答案
答案：C
这题考查倒装句的用法：only+副词 then，后面用部分倒装，即将助动词did放在主语前，句意是：只有那时他才知道造成多大的损失。选C。
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