26. -What do you think of the book?

-Oh,excellent.It's worth　　　　 a second time.

A. to read　　 B. to be read　 C. reading　　 D. being read

25. These photographs will show you　　　　 .

A. what does our village look like

B. what our village looks like

C. how does our village look like

D. how our village looks like

24. Not until the early years of the 19th century　　 what heat is.

A. man did know　　　　　　　 B. man knew

C. didn't man know　　　　　　 D. did man know

23. My brother　　 while he　　 his bicycle and hurt himself.

A. fell;was riding　　　　　　 B. fell;were riding

C. had fallen;rode　　　　　　 D. had fallen;was riding

22. Cheap coal　　　　 a lot of smoke.

A. gives up　　 B. givse in　　 C. gives away　 D.gives off

21. I didn't hear the phone.I　　　　 asleep.

A. must be　　　　　　　　　　 B. must have been　　

C. should be　　　　　　　　　 D. should have been

20. Go on　　　　 the other exercise after you have finished this one.

A. to do　　　　　　　　　　　 B. doing

C. with　　　　　　　　　　　 D. to be doing

19. This year they have produced　　 grain　　　　 they did last year.

A. as less;as　　　　　　　　 B. as few;as

C. less;than　　　　　　　　　 D. fewer;than

18. It is well known that Thomas Edison　　 the electric lamp.

A. invented　　 B. discovered　 C. found　　　 D. developed

17. I　　　　 ten minutes to decide whether I should reject the offer.

A. gave　　　　 B. was given　 C. was giving　 D. had given