Đây nhé

Gọi t là thời gian để 2 xe gặp nhau .

Quãng đường xe 1 đi được cho tới khi 2 xe gặp nhau là :

s₁ = v₁ . t₁ = 48. t₁

Quãng đường để xe 2 đi được cho tới khi 2 xe gặp nhau là :

s₂ = v₂ . t₂ = 32 . t₂

Ta có : t₁ = t_{2 =} t

s = s₁ + s_{2 =} 48t₁ +32t₂ = 80t = 700

=> t = 8,75 h

Vậy 2 xe gặp nhau lúc 7h + 8,75h = 15,75h 15 giờ 45 phút

Nơi gặp nhau cách A là : s₁ = v₁ . t₁ = 48 . 8,75 = 420 km

D . Yes, let's

1, informations -> information ( uncountable noun )

2, encouragement

I have two brothers, Tim and Tom. They are very similar and a lot of people don't know which is which. They both have blond hair and blue eyes. and they always wear jeans and T-shirts.

They like doing the same things,too. For example, they both like jazz and they 're crazy about football. They go to a football match once a week. Tim doesn't like dancing or discos and Tom doesn't like them,either .Although they are twins, they are not exactly the same at everything. Tim works hard at school because he wants to go to university, but Tom is a bit lazy.

Our mother os often away from home bacause of her job, so we all work together in the house. Most of the time in fine , but sometimes we fight a bit.

1 He will be waiting for quite some time

2 Tomorrow at this time I will be dancing at a party

3 This evening ai 8 o'clock, she will be watching a movie with her friends

4 It is rainning tonight

5 Tomorrow we are going to resting and have fun

6 Tonight at 10 o'clock she will be coming home

1. I has been thinking of buying new bicycle for my son. He has been using an old one since he was in secondary school. I have fixed it several times.

2. She is sleeping. She has been sleeping since you went out.

3. How long have you been staying in Da Nang? I have been living there for 3 months. I have finished an English course.

4. She hasn't arrived yet. I have been waiting her for half an hour.Have The film started ?

5. I have been working in this company for 2 years. During that time, I have already met a lot of English people.

6. The rain has just stopped I haven't gone to the market yet because of the rain.

7. She will find another job next month. She has been teaching English in this center for 5 years.

8. They have just joinned the club.

9. She is so tired. She has been arranging the seats for all the people.

10. Don't disturb her. She has not finished her homework. She has been studying for 2 hours.

I .

6. C . lucky

7.D.volunteer.

8. A. although

9. B. receive

10. C. orphanage

II.

1. My sister’s hair is not ______.
A. slim B. fat C. curly D. sociable
2. It’s ______ to meet you, Thu.
A. pleasure B. kind C. nice D. lucky
3. He is my ______. We are in the same class.
A. character B. classmate C. principal D. neighbor
4. I ______ a letter from my friend today.
A. sent B. took C. received D. gave
5. The boy is a ______ student. He always gets good grades.
A. generous B. reserved C. humorous D. hard-working
6. The moon ______ around the earth.
A. rides B. moves C. makes D. takes
7. I find he is not communicative. He’s rather ______ in public.
A. outgoing B. reserved C. sociable D. humorous
8. He’s tall and thin. He has ______.
A. black hair short B. short black hair C. hair short black D. black short hair
9. _______. Are you Mr. Thanh?
A. I’m sorry B. Excuse me C. Hello D. Certainly
10. –“Would you like to go to the movie with me tonight?” –“_______.”
A. Yes, please B. No, thanks C. Yes, I’d love to D. I’m sorry. I’d love to