Bài 4)
1) I gave a present to Mary for her birthday.
2) Ms Philips bought nothing from the supermarket.
3) They have seen the Mayor leave by the back door.
4) The patient was given a cup of hot milk by the nurse.
5) My dishwasher is being repaired by a plumber this afternoon.
6) It is believed that the chairman of the committee is involved in the scandal.
7) This maths problem cannot be solved by anybody in my class.
8) My car will get serviced before we go on holiday.
9) The family is thought to have gone to live in Australia.