@Gấu
Câu 1
⇒ Letters are typed in the office by Mary
Câu 2:
⇒ You will be helped by his father tomorrow
Câu 3:
⇒ Human life has been completely changed by science and technology
Câu 4:
⇒ This bottle was broken by Peter
Câu 5:
⇒ English is being learnt by them in the room
Câu 6:
⇒ My mind can't be changed
Câu 7:
⇒ I hadn't been told about it
Câu 8:
⇒Her telephone number isn't known
Câu 9:
⇒ The children will be brought home by my students
Câu 10:
⇒ I was sent a present last week
Câu 11:
⇒We were given more information
Câu 12:
⇒All the workers of the plan was being instructed by the chief engineer
Câu 13:
⇒Tea can't be made with cold water
Câu 14:
⇒Some of my books have been taken by somebody away
Câu 15:
⇒The meeting will be held by them before May Day
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