9. The leading astronomers of the sixteenth and seventeenth centuries were fascinated by comets.
A) intrigued
B) infected
C) inconvenienced
D) inclined
10. In their productions， choreographers of modern dance have introduced humor， protested social injustice， and probed psychological problems.
A) solved
B) explored
C) involved
D) disputed
11. They agreed to settle the dispute by peaceful means.
A) solve
B) determine
C) untie
D) complete
12. The children trembled with fear when they saw the policeman.
A) wept
B) cried
C) ran
D) shook
13. We were shocked to find that Mary didnt know her guests name.
A) frustrated
B) disturbed
C) relieved
D) surprised
14. We have got to abide by the rules.
A) stick to
B) persist in
C) safeguard
D) apply
15. The river widens considerably as it begins to turn east.
A) extends
B) stretches
C) broadens
D) traverses
KEYS：DABAB DCAAB ADDAC