Question

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

C

每一年有许多树被栽，根据此意可以判断出本题使用的是一般现在时的被动语态，结构为be+过去分词，本题的主语为复数，故用are planted，故本题选C。