Chia các động từ sau ở bị động : 1.Before we arrived all the washing up ( do ) .... 2.Before she came a singer a lot of practice ( do ) by her .... 3.After the food (cook) , he served every one ... 4.They didn't want to go with us because that film ( see ) by them ... 5.A new hospital ( build ) before yesterday .... 6.No letters ( write ) before i arrived ... 7.After a film (make) . They show it in public .... 8.By the time my mother came home , the house ( clean ) .... Giúp mình với ạ :((((