Question

【题目】Then environment in our town is getting worse and worse, so plenty of trees___________.

A. are planting B. should be planted C .should plant

Answer 1

【答案】B

【解析】

句意：然后我们镇上的环境变得越来越糟糕，所以很多树应该被种植。are planting现在进行时；should be planted应该被种植，是被动语态；should plant应该种植，主动语态。根据句意可知，主语plenty of trees与动词plant构成被动关系，应使用被动语态，选B。