Question

16.it was notuntil he had finished all his work ______. A)when he returned

16.it was notuntil he had finished all his work ______.
A)when he returned
B)that did hereturn
C)when did hereturn
D)that he returned
请问答案为什么选D呢，请帮我详细的解答一下，谢谢

Answer 1

这是强调句，其结构是 It is/was ... that...。

明白了这个句型，首先排除A、C。
that 后面的语序不需要倒装，排除B。

所以选择 D。

句子中，被强调的是时间状语 not until he had ...

如果不用强调结构，则是：

He didn't return until he had finished all his work. （直到他完成所有的工作，他才回来。）

倒装的情况是这样的：
Not until he had finished all his work did he return.

Answer 2

选B
里面涉及到连个语法点
一个强调句型 it +is/was +…+that/ who +…去掉之后句子还是一个完整的句子，不影响意思。
一个是倒装，not until 放在句首，句子倒装，did he return.

Answer 3

All等不定代词修饰先行词或作先行词时，必须用that关代