With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.（1分）<br>Awhat<br>Bwhich<br>Cwhere<br>Dwhen

With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.（1分）
Awhat
Bwhich
Cwhere
Dwhen

出自：山东第一医科大学2022年下半年英语2（本）在线考试

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