英语该改被动语态

题目

英语该改被动语态
we should plant many trees on the mountains.
parents should allow teenagers to go out with their friends.
parents should allow fourteen-year-olds to choose their own clothes.
we must send more satellites into space.
you can use a dictionary in the exam.

答案

we should plant many trees on the mountains.Many trees should be planted on the mountainsparents should allow teenagers to go out with their friends.Teenagers should be allowed to go out with their fr...