7. If you want to do the experiment again, you’d better be more careful ____ you made a mistake.
A. when B. why C. where D. in case
6. We must take measures to protect endangered wildlife___ it is too late.
A. now that B. as long as C. unless D. before
5. . ----Are you sure that he is able to do the work well?
---- _______ he could give his mind to it.
A. In case B. If only C. On condition that D. Unless
4.I have realized the truth from my life story that suffering kills you, it makes you stronger.
A.though B.before C.if D.unless
3. --Take a cigarette, please.
--No, thanks. It’s three years I smoked.
A. before B. since C. after D. when
2.My mother is always warning me when l go out,“Don't get off the bus it is stopping.”
A.until B.before C.while D.after
1. he met with the difficulty did he realize the importance of our help.
A.Even though B.Never until C.Only before D.Ever since
20. I usually watch TV in the evening ____________I have to study for an examination.
A. because B. unless C. while D. the moment
状语从句强化训练题
19. We made a decision __________there would be rain, we should stay at home.
A. that B. if C. that if D. whether
18. Father was ________busy in working __________he often forgot rest or meals.
A. very, that B. so, that C. such, as D. enough, as
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