单项选择题

Practically all species of animals communicate either through sounds or through a large repertory of soundless codes.

A. Simultaneously
B. Almost
C. Absolutely
D. Basically
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I rarely wear a raincoat because I spend most of my time in a car.
A. normally
B. seldom
C. continuously
D. usually
单项选择题
I catch cold now and then.
A. always
B. occasionally
C. constantly
D. regularly
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