1、The old man should be spoken to politely by us .
2、你应该说的是两种情况吧.
Was a birthday present bought to you by your mother
Were you bought a birthday present by your mother
3、When are the desks and chairs cleaned by them every week
4、The flowers haven't been watered by them .
5、More trees will be planted by them next year .
如果不会再和我联系!祝进步!