It wasn't until later_ I was riding my bike home_ I realized what it was. A

Question

It wasn’t until later_ I was riding my bike home_ I realized what it was. A. that; that B. that; when C. when; that D. when; that

Answer 1

答案：C

翻译：直到当过了一会我正骑车骑车回家的时候我才意识到这是什么。

解析：这是 【not until】的强调句式，把它变成一般句式：

I didn't realized what it was【until】when I was riding my bike home later.

when 引导的时间状语从句。it was 。。。that 结构是强调结构， 强调的是later，所以把later提前。因为later，意思是：一会。表示的是时间，所以使用when引导时间状语从句，而不使用that。剩下的空就是强调结构中的that了

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Answer 2

It wasn’t until later B_ I was riding my bike homeB_ I realized what it was. A. that; that B. that; when C. when; that D. when; that

Answer 3

答案是C