单项选择题

By cutting down trees we ______ the natural home of birds and animals.

A．harm
B．hurt
C．injure
D．damage
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单项选择题
Having been discussed, the proposal was ______ unanimously.
A．adapted
B．adopted
C．admitted
D．adjoined
单项选择题
Nancy was surprised that they have ______ . They seemed to be a happy couple.
A．split up
B．broken down
C．fallen through
D．knocked out
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