21. Hardly ______ he got out of the court ______ the reporters raised a lot of questions to him.

a. had … when b. had…than c. did…when d. has…than

20. ______ the beginning of the 19th century did scientists know that all matter is made up of atoms.

a. At b. By c. Up to d. Not until

19. Beneath our feet ______ that our life depends on for food and clothing.

a. the earth lay b. the earth lies c. lie the earth d. lies the earth

18. ______ a little more time to think, he might have acted more sensibly.

a. If he took b. If he has taken c. had he taken d. Should he take

17. ______ notebook and report that I promised you last week.

a. Here is the b. Here are the c. Is here the d. Are here the

16. A sneeze cannot be performed voluntarily, ______ be easily suppressed.

a. nor it can b. nor can it c. it cannot d. and cannot it

15. So fast ______ that it is difficult for us to imagine its speed.

a. light travel b. travels the light c. do light travel d. does light travel

14. ______, I must do another experiment.

a. Be it ever so late b. It is ever so late

c. It be ever so late d. So late it be ever

13. Her answer is not acceptable, and ______.

a. neither am I b. either is mine c. neither is mine d. mine is neither

12. ______ is it only the ignorant and ill-educated person who has such faith in the bottle of medicine.

a. Either b. Often c. Nor d. Usually