Ourgovernmenthastriedmanywaysto

問題詳情：

Our government has tried many ways to _________ the smog haze(霧霾) problem. Maybe we’ll

      have a clear sky in the near future.

A. come up with        B. put away            C. set up                D. work out

【回答】

D

知識點：動詞和動詞短語

題型：選擇題