Question

【题目】Every year lots of trees _______ to make our country more beautiful.
A.is planted
B.was planted
C.are planted
D.were planted

Answer 1

【答案】C
【解析】句意：每一年有许多树被栽让我们的国家更美丽。trees与plant构成被动关系，every year是一般现在时的标志，故用一般现在时的被动语态，结构为be+过去分词，主语trees是复数，故用are planted，故选C。