问题 选择题
It was ___ he came back from school today ___ he found his new book missing.
A.when; then
B.not; until
C.not until; that
D.only; when
答案

答案:C

考查强调句型。句意“直到今天他从学校回来,他才发现他的新书不见了。”It is ...that是强调句型,可以强调除谓语外的任何成分,把强调句型去掉,不影响句意。故选C。

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