4. Again as __________ in this experiment, he didn' t lose heart.
A: he failed
B: did he fail
C: he did fail
D: had he failed
A: he failed
B: did he fail
C: he did fail
D: had he failed
举一反三
- He ______ the test again, because he looks upset. A: must fail B: must have failed C: can’t fail D: can’t have failed
- 他未能按时完成工作。 A: He didn’t fail to finish the work in time. B: He failed to finish the work on time. C: He didn’t fail to finish the work on time. D: He failed to finish the work in time.
- No one failed in the exam, _____ ? A: was he B: did one C: did they D: didn’t he
- Though he (fail) ________ many times, Paul didn’t lose heart.
- 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.