题目内容
Our neighbor offered to look after our baby yesterday when we were busy, _____is often the case.
| A.it | B.that | C.which | D.as |
D
试题分析:考查定语从句。这里考查由as引导的非限定性定语从句,as在句中由“正如”之意。句意:昨天当我们都很忙的时候,我们邻居主动来照顾我们的婴儿,通常就是这样的。故D正确。
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