单项选择题

Silk, although it is considered a delicate fabric, is in fact very strong, but it is adversely affected by sunlight.()

A. soft
B. sheer
C. fragile
D. refined

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单项选择题
Before you decide on a vocation, it might be a good idea to consult a few good friends.()

A. career
B. holiday
C. plan
D. research
单项选择题
There are some things in the class the teachers will not put up with.()

A. tolerate
B. contribute
C. resist
D. prohibit
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