单项选择题

Although fish have no vocal organs, they still are able to make noises.

A. signals
B. bubbles
C. sounds
D. ripples
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单项选择题
It is difficult to get young people to plan for their old age, which seems very distant to them.
A. impossible
B. faraway
C. observable
D. fearful
单项选择题
Every country represented in the Olympics has a National Olympic Committee that selects the athletes who compete in the games.
A. chooses
B. honors
C. supports
D. trains
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