11.____drills that have no real topic have to remainas they are.
A. Manufacture B. Manipulative? C. Manipulate D.Manifest
12. This book has been in the works so long that I have lost ____of most of the sources found for me by the staff of the library.
A. trace B. trail C. track D. touch
13. The elbows on your coat have worn thin, so I must ____them.
A. mend B. patch C. repair D. pitch
14. ____and wage increases have not kept in step.
A. Production B. Product? C. Produce D. Productivity
15. People under stress have performed____feats of strength, like lifting an automobile off an accident victim.
A. specific B. extraordinary C. abrupt D. abnormal
16. Modern appliances____us from a good deal of household work.For instance, the dryer frees us from hanging the laundry.
A.escape B . benefit C. liberate D. comfort
17. The audience waited in____silence while their aged speaker searched among his note for the figures he could not remember.
A. respective B. respect C. respectful D. respectable
18. The disappearance of her paper has never been ____.
A. counted for B. looked up ? C.accounted for D. checked up
19. When he was asked about the missing briefcase, the man ____ever seeing it.
A. refused B. denied C. opposed D. resisted
20. Communication between a young couple is a(n)____business.
A. sharp B. dreadful C. intense D. delicate