问题补充:
— Were you worried about him last night?
— Yes. It was .
A. until he returned that I went to bed
B. until be returned that l slept well
C. not until he returned that I went to bed
D. not until did he return that I went to sleep
答案:
A. until he returned that I went to bed
B. until be returned that l slept well
(答案→)C. not until he returned that I went to bed
D. not until did he return that I went to sleep
解析:此处强调句型,强调是until从句,如复原应为I didn go to bed until he returned.这个句型变为强调句型应注意,主句中的not在强调句中移至until之前。