9. The line was busy. Someone _______ the telephone.
A. must be using
B. must use
C. must have been using
D. should have been using
10. The boss urged his workers _______.
A. away
B. off
C. up
D. on
11. I know you will not let me _______.
A. in
B. up
C. down
D. out
12. Occasionally she and her husband _______ ride into the country for a picnic.
A. could
B. must
C. would
D. should
13. If you buy two books, you’ll get another one _______
A. thrown away
B. thrown off
C. thrown up
D. thrown in
14. As _______ health, I have nothing useful to say as I have little experience of illness.
A. regards
B. regard
C. regardless
D. regarding
15. The total effect of Edison’s career _____ the sum of all of his inventions.
A. excels
B. succeeds
C. affects
D. surpasses
