单项选择题

Some of these studies (have shown) that although some people have trouble (to fall asleep), others have an (equally) difficult time (waking up).

A. have shown
B. to fall asleep
C. equally
D. waking up
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单项选择题
Confucius - a statesman, scholar, and (educator) of (great skill) and reputation - is generally held to be China’s (greatest) and most (influence) philosopher.
A. educator
B. great skill
C. greatest
D. influence
单项选择题
According to the passage, vampire bats ______。
A．live on the blood of living creatures
B．are believed to be fond of delicate women
C．never ever fly in the daylight
D．are the evil spirit of Count Dracula
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