单项选择题

Space is full of unseen hazards among which are cosmic rays.

A．dangers
B．ventures
C．galaxies
D．prospects
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单项选择题
Don't be so innocent as to believe everything the politicians say.
A．illiterate
B．ignorant
C．stupid
D．simple
单项选择题
More and more people nowadays are exercising, quitting tobacco, losing weight and becoming more health-conscious.
A．given in
B．giving out
C．giving away
D．giving up
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