Câu 1: Despite his well-paid job, he still lives in poverty

=> Though.... he has a well paid job, he still lives in poverty....

ta có cấu trúc ngữ pháp : though + clause, main clause

Câu 2 : You'll have to put on smart clothes at the wedding party ( up )

=> You'll have to dress up at the wedding party.

vì put on smart clothes cùng nghĩa với dress up  có nghĩa là ăn mặc lịch sự , bảnh bao

Câu 3 : The cost of living has been increasing in the past few weeks ( up )

=> The cost of living has been going up in the past few weeks.

vì increase cũng nghĩa với up có nghĩa là tăng trưởng về 1 vấn đề gì đó

1. Though he has a well-paid job, he still lives in poverty

 - Though + clause, main clause: Mặc dù...

2. You'll have to dress up at the wedding party.

 - put on smart clothes = dress up: ăn mặc lịch sự, bảnh bao

3. The cost of living has been going up in the past few weeks.

 - increase = go up: tăng