题目内容
---- I’ve had a bad cough recently.
----Me too. I’ve never experienced ______ of air pollution in cities before.
A. an acute problem B. a more acute problem
C. a most acute problem D. the most acute problem
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题目内容
---- I’ve had a bad cough recently.
----Me too. I’ve never experienced ______ of air pollution in cities before.
A. an acute problem B. a more acute problem
C. a most acute problem D. the most acute problem