—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

【回答】

A

知識點：動詞語態

題型：選擇題