20. - Can I use your computer now?
-________. It doesn’t work.
A. That’s all right B. You’re welcome C. I’m afraid not D. It doesn’t matter
19. ________ this road and you’ll get to the cinema quickly.
A. To follow B. Following C. Follow D. Followed
18. All the things must be done well.
A.worth to do B.worthy of being done
C.worthy doing D.worth of doing
17. -What made the teacher so angry?
-_________ late again.
A. Tom’s being B. Because Tom was
C. Tom was D. Tom being
16. The research is so designed that once _______ nothing can be done to change it.
A. begins B. having begun C. beginning D. begun
15. -You were out when I dropped in at your house.
-Oh, I for a friend from England at the airport.
A.was waiting B.had waited C.am waiting D.have waited