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Only then _____ how much damage had been caused.
A.she realizedB.She had realized
C.had she realizedD.did she realize
D

试题分析:only + 状语 / 状语从句位于句首时,句子/ 主句要用部分倒装。将谓语的一部分(即情态动词、系动词或助动词)提到主语前的称为部分倒装。如句中没有情态动词、助动词或系动词,谓语只是一个实义动词,要在主语前加助动词do,does或did,主语后的实义动词用原形。
点评:部分倒装,常见的有:(1) 含有否定意义的词never,seldom,little. hardly,not,scarcely,nowhere,by no means(决不)等置于句首时。(2)以only修饰的副词、介词短语或从句放在句首时。 注意:only 修饰状语从句放在句首时,只能倒装主句部分。(3)当so置于句首意为“也如此”,neither,nor置于句首意为“也不”时。当so表示对前句内容的肯定和附和,译作“确实,正是”时,用自然语序。(4)当not only…but also, so/such…that, not… until, no sooner… than, hardly… when等连词置于句首时。(5)在as引导的让步状语从句中(名词/形容词/副词/动词+as+主谓结构)。(6)虚拟语气的条件状语从句省去 if时,须将were,had,should提到句首构成倒装句。(7)频度副词often, always, once, now and then, every other day, many a time等放在句首时。(8)为了使句子保持平衡,为了强调表语或为了使上下文紧密衔接时,常使用倒装语序。
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