题目内容

They also warn that these countries are among the most_________to climate change.

A. lax
B. vulnerable
C. addictive
D. nasty

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Some college students may _________net surfing, which impairs their physical and mental health.

A. be addicted to
B. be supposed to
C. be added to
D. be opposed to

Throughout history, ____________________________________________________.

Members __________________________________________.

They __________________________________________________.

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