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