1 According to some observers, television has acquired a disquieting monopoly over peoples leisure time.
A recent
B business
C noisy
D troubling
2 Professor Smith continued his research work and disregarded his colleagues advice.
A ignored
B deplored
C explored
D implored
3 Before the development of movable metal type in the mid-fifteenth century, news was disseminated by word of mouth, by letter, or by public notice.
A organized
B requested
C distributed
D limited
4 Corn, domesticated by the American Indians, was brought to Europe by Columbus.
A trained
B cultivated
C implanted
D reared
5 Of all the wild dogs, none is more closely related to the domesticated dog than the wolf.
A ordinary
B tame
C faithful
D hunting
参考答案：1. D2. A3. C4. B5. B