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题目内容
（许昌大学大学英语4(专升本)）
(单选题) The researchers are more and more ______ the environmental pollution.( )(本题1.0分)
A、 involved in
B、 concerned
C、 conducted
D、 dealt with
A、 involved in
B、 concerned
C、 conducted
D、 dealt with
参考答案