单项选择题

Within the next 20 years, various regions of the world may experience severe changes in climate. Some may be vulnerable to longer droughts, others to more coastal flooding.

A．immune
B．capable
C．intriguing
D．exposed
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单项选择题
When the workers are organized in trade unions, their employers find it hard to lay them ______ .
A．out
B．up
C．off
D．down
单项选择题
Your left ______ hemisphere controls the right-hand side of your body.
A．agile
B．cerebral
C．maniac
D．overbearing
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