题目内容
It is ______ breakouts of bird flu that many monitoring stations have been set up, not to disturb the living environment of wildlife.
A．controlling B．having controlled C．to control D．controlled
C
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题目内容
It is ______ breakouts of bird flu that many monitoring stations have been set up, not to disturb the living environment of wildlife.
A．controlling B．having controlled C．to control D．controlled
C