1. It could not have been Tom whom you saw in the department store.

Could not have + past participle: cái gì không có khả năng xảy ra trong quá khứ

2.We had to call the doctor because of the baby's high temperature.

because of + N/ V-ing phrase

3. You had better not tell anybody about the discovery

  S + Had better (not) + V: được dùng để đưa ra lời khuyên, hoặc bảo rằng người nào đó nên hoặc không nên làm điều gì trong một tình huống nào đó.

4. The boys made fun of the man in spite of his old age.

make fun of (someone or something): chế nhạo hoặc lăng mạ ai đó hoặc điều gì đó.

5.(Please) help yourselves to any food you like.

help yourself (to something): lấy bất cứ thứ gì bạn muốn mà không cần hỏi, thường dùng trong bữa ăn.

6. What made him resign?

resign:(v) từ chức=>resignation(n) sự từ chức

7. Did the children have a good time during the performance?

8. We haven't heard from him since March.

hear from: nhận được thư từ, email, cuộc gọi của người nào đó để nói về 1 vấn đề nào đó.

9. There is no need to worry about the future

There is no need to do sth: không cần thiết làm gì

10. Every student was awarded diplomas.

All + N+ V(plural)

Every + N+ V(singular)

Chúc bạn học tốt!

$1$. It couldn't have been Tom whom you saw in the department store

$2$. We had to call the doctor because of the baby's high temperature

$3$. You had better not tell anybody about the discovery

$4$. The boys made fun of the man in spite of his old age

$5$. Help yourselves to any food you like

$6$. What made him resign ?

$7$. Did the children have a good time during the performance ?

$8$. We haven't heard from him since March

$9$. There is no need to worry about the future

$10$. Every student was awarded diplomas