改为被动语态 They have read the book three times.we should allow six-year-olds to choose their own clothes.
问题描述：
改为被动语态 They have read the book three times.
we should allow six-year-olds to choose their own clothes.
答
The book has been read three times by them
six-year-olds should be allowed to choose their own clothes.
答
The book has been read three times .
Six-year -olds should be allowed to choose their own clothes .
答
The book has been read three times by them .
Six-year-olds should be allowed to choose their own clothes by us.