Question

【题目】Young trees ________ every year to keep the sand away from the city and make the environment better and better.

A.were plantedB.have plantedC.will plantD.are planted

Answer 1

【答案】D

【解析】

句意：每年都要种上小树，使城市远离沙尘，使环境越来越好。

本题考查被动语态。Plant意为“种植”。根据本句的时间状语every year每年可知，本句应该用一般现在时态，又因主语Young trees和plant之间是动宾关系，所以应该用被动语态，故选D。