He is determined to become a doctor  (heart) => He has set his heart on becoming a doctor.

14. look out ạ, không phải look up

1. D `->` does he

2. C `->` that

3. D `->` polished

4. B `->` visit

5. A `->` such a brilliant scientist

2. School uniforms must be worn at all times by young pupils.

--> Young pupils must wear school uniforms at all times.

1.Where is your younger brother?”, Minh asked me.

➔ Minh asked me where my younger brother was.

2. “Say goodbye to my grandparents”, they said.

➔ They asked me to say goodbye to their grandparents.

3. “ Did Mr Bean send the letter to you?”, Mai asked him.

➔ Mai asked him if Mr Bean had sent letter to him.

4. “Where is the best place to eat pizza?”, Oanh asked.

➔ Oanh asked where the best place to eat pizza was.

5. “What do you want for dinner tonight, Ly?”, he asked.

➔ He asked Ly what she wanted for dinner that night.

6. Jun asked me, “Did you go to work yesterday?”

➔ Jun asked me if I had gone to work the day before.

7. My sister asked him, “How long have you learnt English?”

➔ My sister asked him how long he had learnt English.

8. She wanted to know, “Are you a teacher?”

➔ She wanted to know if I was a teacher.

9. My grandfather asked her, “Does you enjoy your job?”

➔ My grandfather asked her if she enjoyed her job.

10 .He asked, “When did you buy it?”

➔ He asked me when I had bought it.

1. study

2. is

3. will write

4. will have

5. doesn't hurry

6. took

7. would happen

8. were

9. would see

10. would go

11. was

12. had to

13. lived

14. spoke

1.

- Global warming has led to many natural disasters.

- Global warming has resulted in many natural disasters.

- Many natural disasters have been caused by global warming.

2. My brother isn't keen on making models.

1. She asked him if he had read that book.

2. He asked me who the girl over there was.

3. Tom aksed Mary if she had phoned him the day before.

4. I asked Mary if she knew  how far the swimming pool was.

5. He said me if I liked that and I said yes.

Do you know the girls playing tennis over there?

Do you know the girls playing table tennis over there?