It was not until he entered the classroom ______ he realized that he had forgott

游客2023-11-19  26

问题 It was not until he entered the classroom ______ he realized that he had forgotten to do the homework.

选项 A、before
B、when
C、then
D、that

答案 D

解析 此句使用了强调句型,即It is (was)... that....
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