Question

【题目】In order to make Dandong more beautiful, more trees and flowers ________ every year.
A.will plant
B.should plant
C.should be planted
D.must plant

Answer 1

【答案】C
【解析】句意：为了使丹东更漂亮，应该每年种植更多的树木和花。A.主动语态的将来;B.有情态动词的主动语态;C.有情态动词的被动语态;D.必须种植。主语和谓语动词之间是动宾关系所以用被动结构，合有情态动词的被动结构是情态动词+be done。故选C。