16. Smoking is so harmful to personal health that it kills _____ people each
year than automobile accidents.
A)seven more times
B)seven times more
C)over seven times
D)seven times

17. It’ s easy to blame the decline of conversation on the pace of modern life and on the vague changes ______ place in our ever-changing world.
A) taking
B)to take
C)take
D)taken

18. This is an exciting area of study, and one _____ which new applications are being discovered almost daily.
A) from
B)by
C) in
D) through

19. _____ can be seen from the comparison of these figures, the principle
involves the active participation of the patient in the modification of his condition.
A) As
B) What
C) That
D) It

20. Although I had been invited to the opening ceremony, I was unable to
attend _____ such short notice.
A)to
B)in
C)with
D)on
16.B 17.C 18.C 19.A20.D