The problem of air pollution and acid rain are likely to( ).
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The problem of air pollution and acid rain are likely to( ).
A、improve B、return C、worsen D、change 【正确答案】:C 【题目解析】:本题考查动词辨析。improve“改善,提高”, return“恢复”, worsen“恶化”, change“改变”。句意:空气污染和酸雨的问题可能会恶化。故选C。