31. I remember his telephone number is 8666888, but you’d better ___________.

A．be sure　　　　　　 　　 　　　 B．make sure

C．find out　　　　　　　　　 　　　 D．look out

30. .- What do you think of the grammar book?

　 - Oh, it really is ________ useful reference book, which is worth reading ________ second time.

A．a; a　　　　　　　　　 B．an; the

C．an; a　　 　　　　　　　 D．the; the

29. I saw your father ______ under the tree, ______.

　 A．seat; thinking　　　　　 　 B．seating; though

　 C．seated; think　　　　　 D．seated; thinking

28. - Did you have trouble with your car this morning?

- Yes, but I finally managed _______.

　 A．to get it start　　 　　 B．get it starting　　 C．to get it started　　 　 D．getting it stated

27. She ____________ the path as the trees around her became thicker.

A．lost sight of　 　　　　 B．caught sight of　 C．lost sight　 　　　　　　　　　　 D．caught sight

26. Tom, you are so lazy! This work ________ hours ago.

　 A．should finish　　　　　　 　　　 B．must have finished

C．should have been finished　 　　 D．might have finished

25. Not only ______ a promise, but he also kept it.

　 A．does he made　　　　　 B．he had made

　 C．did he make　　　　　　 D．he makes

24. - What made you so deeply ______?

　 - His _______speech.

　 A．moved; inspiring　　　　　 B．moving; inspiring

　C．heard; speaking　　　　　　 　　　 D．hear; spoken

23. Whatever she said, she couldn’t make herself _________.

　A．understand　　 B．to understand　　 　　　 C．understanding　　 　　　　　 D．understood

22. . Hard work and proper ways can ________ to success.

　 A．lead　　　　 B．lead to　　　　　　 C．led　　　　　　 　　　　 D．leading to