22.We should have ability to take a leadership role within group situations.
Cấu trúc: be able to V = have ability + to V (có khả năng làm việc gì)
23.The way to use a time log is useful for eliminating wasted time.
24.The window-washer is coming soon so you don't need to clean the window.
25.We don't need to work overtime..........
26.We needn't have brought food because we didn't know that there were lots of food stalls there.
27. You have don't to do it now
28.you shouldn't have criticized him in front of many people.
29.How long you haven't seen "....."?
30.When did you start working as a teacher?
31.Nam has not gone to the cinema for 2 years
