—ThereisalotofwindinNorthChina.     —Well,moretrees

問題詳情：

—There is a lot of wind in North China.

      —Well, more trees ________ every year to stop the wind.

         A. must be planted B. can planted C. should planted  ted

【回答】

A

知識點：動詞語態

題型：選擇題