直到他考试不及格，他才知道努力学习很重要。
A: Not until he failed the exam he knew that working hard is important.
B: Until he failed the exam did he know that working hard is important.
C: Not until did he fail the exam he knew that working hard is important.
D: Not until he failed the exam did he know that working hard is important.
A: Not until he failed the exam he knew that working hard is important.
B: Until he failed the exam did he know that working hard is important.
C: Not until did he fail the exam he knew that working hard is important.
D: Not until he failed the exam did he know that working hard is important.
举一反三
- Not until he failed the exam ____ that working hard is important. A: had he know B: did he know C: he knew D: he had known
- He failed the exam, ______ proved that he hadn’t been working hard enough. A: [A] that B: which C: what D: of which
- He failed in the exam,_______proves that he hadn’t worked hard enough.
- No one failed in the exam, _____ ? A: was he B: did one C: did they D: didn’t he
- He failed the exam,________ proves that he hadn't worked hard enough. A: that B: which C: such D: what