Thời gian ô tô đi từ a đến b là:

10 giờ - 8 giờ 30 phút = 1 giờ 30 phút = 1,5 giờ

Vậy lúc ô tô đi đến b thì xe máy đã đi được từ b là:

20 x 1,5 = 30 (km)

Bài toán chuyển động cùng chiều:

Hiệu vận tốc của 2 xe là: 30 - 20 = 10 (km/giờ)

Khoảng cách lúc này của 2 xe là: 30 km

  Vậy thời gian để 2 xe gặp nhau là:

                     30 : 10 = 3 (giờ)

                                       Đáp số: 3 giờ

1. His name is Hoang/ 2. he is a student./ 3. Every day, he gets up at 5:30 / 4. He takes a shower and gets dressed/ 5.he has a breakfast then leaves house at 6:30./6. The school is near his house so he walks./ 7. the classes start at 7.30 and end at11.30/ 8.Hệ walks home and has the lunch at 12.00.

9. the bakery is between the house and the factory/ 10.in front of the house, there are a well and some flowers./11. near the house there is a rice paddy/ 12. my house is beautyful.

*Odd one out :
1. a. big    b. small    c. old                d. well
2. a. flower    b. lake        c. tree                d. garden
3. a. town    b. city        c. country        d. house
4. a. travel    b. bike        c. bus                d. car
5. a. get    b. travel    c. school    d. start
*Choose the word that has the underlined part pronounced differently.
1.a. vegetable    b. lake    c. tall    d. plane
2.a. restaurant    b. river    c. well    d. left
3.a. office    b. behind    c. clinic    d. picture
4.a. photo    b. motorbike    c. home    d. work
5.a. hour                            b. house                c. half                            d. hotel

1. It's a pity I can't go to the beach today, but I have to stay at home and study.

could      I wish i could go to the beach today, but I have to stay at home and study.

2. If it weren't raining, we could go on a picnic.

stop        I wish it had stopped so we could go on a picnic.

3. It's a shame we didn't see the exhibition.

had         We wish we had seen the exhibition.

4. George needs a new car but he can't afford to buy one.

could      George wishes he could  afford to buy a new car.

5. It's a pity Jenny wasn't invited to the party.

been       Jenny wishes she had been invited to the party.

6. I've been offered a job in Paris but I can't speak French.

speak      I wish i could speak French because I've been offered a job in Paris.

7. George never arrives on time when we arrange to go out.

only        If only George arrives on time when we arrange to go out.

8. I would really like to be lying on the beach now.

were        I wish i were on the beach now.

9. Your mother's worried about you. You should phone her.

better       You had better phone your mother your mother as she's worried about you.

10. Will you ever think about finding a flat of your own?

time          It's time about finding a flat of your own.

11. Look at how he lives - he thinks he is a millionaire.

if               He lives if he were a miliionaire.

12. This summer, I would rather book a holiday in Monaco than Lyons.

prefer       This summer, i prefer book a holiday in Monaco rather than Lyons.

13. Why didn't tell me yourself that you were leaving?

rather       I'd not rather tell me yourself that you were leaving.

14. She wants to be more like her mother.

wishes     She wishes she were more like her mother.

15. I should have taken that job in Canada last year.

only         If only i shouldn't take that job in Canada last year.

16. You should have checked the oil before you set out.

better       It is better that you had checked the oil before you set out.

Chúc bn học tốt nhé! Mk cũng ko chắc lắm