(2010·江西)Not until he left his home ________ to know how important the family was for him.
A．did he beginB．had he begun
C．he beganD．he had begun
A
考查倒裝句。句意：直到離開家，他才開始意識到這個家對他來說是何等的重要。not until引導(dǎo)的從句置于句首時，主句需用部分倒裝，同時not要置于until之前。由于主句和從句的動作幾乎同時發(fā)生，故用一般過去時。題干還原為：He didn't begin to know how important the family was for him until he left his home.
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