Question

—Our school is beautiful!
—It will be more beautiful if more trees and grass ______ by us.

1. A.
   plant
2. B.
   is planted
3. C.
   are planted

Answer 1

C
考查语态及主谓一致。句意：我们的学校很漂亮。——如果我们种更多的树木和草，它将会更美丽。英语中当主句为一般将来时态时，状语从句中用一般现在时态表示将来的动作.从句主语trees and grass 是动作的对象，故用被动语态。trees and grass是并列主语，表达复数含义，故系动词用复数形式。选C。