21. They would rather like to go for a walk in the evenings.
-> would like

- Would rather + V-inf

- Would like to V-inf
22. I think the weather is going to be fine tomorrow.
-> will be

- "I think" nên không có căn -> TLĐ
23. It is impossible for me be there before 8p.m
-> to be

- It'adj for sb to do sth: Nó thật như thế nào đấy cho ai đó làm gì
24 He is the best successful businessman
-> most

- So sánh nhất với adj dài: most + adj
25. She has started learning to drive two weeks ago.
-> started

-C1: S + started/ began + V+ ing/ to  + V_{bare - inf} + khoảng thời gian + ago

=C2:   S + have/ has + P_II + for + khoảng thời gian

26. Unless she will study hard, she will fail the exam.
$$-> studies$$

- Điều kiện loại 1: If + S + V(HTĐ), S + will/can + V-bare

- Unless= If not
27. They are going to invite some friends to our wedding party on next Saturday.
-> bỏ