There has been a growing concern______pollution. But those who concern themselves______this problem need government support.

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问题 There has been a growing concern______pollution. But those who concern themselves______this problem need government support.

选项 A、for, about
B、over, with
C、about, for
D、on, to

答案B

解析 句意:人们越来越担心污染问题。然而那些关注这一问题的人们需要政府的支持。concern about/over sth.是固定搭配,表示“关心,担心”;而concern oneself wichsth.表示“(让自己)关心,关注某事”。
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