Question

The local government announced that only when the fire was under control ________ to return to their homes.

1. A.
   the residents would be allowed
2. B.
   had the residents been allowed
3. C.
   would the residents be allowed
4. D.
   the residents had been allowed

Answer 1

C
试题分析：考查Only引导的部分倒装句。Only引导的倒装句要满足两个条件，only放在句首，且强调的是状语。本题only放在了后面句子的句首，强调是是时间状语从句when the fire was under control。故使用部分倒装的形式。句意：当地政府宣布，只有当大火被控制住以后，据居民们才可以返回家中。故C正确。
考点：考查部分倒装句
点评：部分倒装中考查较多的有：(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修饰作为状语的副词、介词短语或从句，且放在句首时。　注意：only 修饰状语从句放在句首时，状语从句不需要倒装，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。