单项选择题

As we all know, thick forests are the natural ______for birds, animals and insects, and we must forbid cutting trees without any limitation.

A. habitat
B. resort
C. residence
D. refuge
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单项选择题
It has been rainy these days. It is not______of a day for a walk after supper.
A. much
B. so much
C. too much
D. as much
单项选择题
The policeman was in plain clothes, watching for a______character at the airport all night.
A. suspicious
B. suspect
C. susceptible
D. doubtful
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