此题是要求把句子变成被动语态.
2.Machines are made by the workers .
3.Little children and old people are taken good care of by them .
4.Meals are often cooked by my mother .
5.Singing is studied by us on Friday night .
此题是要求把句子变成被动语态.
2.Machines are made by the workers .
3.Little children and old people are taken good care of by them .
4.Meals are often cooked by my mother .
5.Singing is studied by us on Friday night .