1. You should use a dictionary to look up new words.
look up (ph.v) = check: tra cứu (thường là tra từ điển).
2. The doctor told my father to give up smoking.
give up doing sth = stop doing sth: từ bỏ, dừng việc làm gì đó.
3. The cost of living has been going up considerably in the past few weeks.
go up (ph.v) = increase: tăng lên.
4. Margaret Thatcher was born and grew up in the town of Grantham, Lincolnshire, England.
grow up = spend SO's childhood: lớn lên, dành cả thời thơ ấu ở đâu đó.
5. His business is going badly, so he will have to close it down soon.
close down = stop: dừng hoạt động, đóng cửa.
6. My aunt has got two teenage children, but they don't seem to get on well with each other.
get on well with sb = have a good relationship with sb: có mối quan hệ tốt với ai đó.
Bạn có thể hỏi thêm nếu chưa rõ nhé!
Chúc bạn học tốt.