请把下列句子改为被动语态.
1.They make machines in that factory.
2.Every body likes this song.
3.He doesn't show the stamps to me.
4.People don't grow rice in the west of Japan.
5.He often helps Tom when Tom is in trouble.
6.Do the workers build many buildings?
7.Does Kate sometimes break glasses?
8.Do you always send a letter to Mr Hu?
9.What does the teacher often tell the boys to do?
10.How many desks do they buy every term?
回答一道也可以，一道就好！我们的同学都等着那！