vận tốc của ô tô đi từ b là

50:100x90=45 (km/h)

tổng vận tốc của 2 xe là :    

50 +45=95 (km/h)

thời gian đi dể 2 xe gặp nhau là

144 : 95 = 144/95 (giờ)

2 xe gặp nhau lúc là

7h 30 phút +144/95 giờ =1713/190 ( giờ )

Ex 1 : Điền động từ .

1. I don't often drink coffe .

2. The swimming pool open at 7:30 every morning .

3. Bad driving have many acidents

4. My parents live in a very flat

5. The Olympic Games is place every four years

6. The Panama Canal in the Atlantic and Pacific oceans

1 .drink

2.opens.

3.have

4.lives

5.is

6.in

1. The swimming pool (open) ………opens………………. at 7.30 every morning.

2. The Olympic Games (take) …………takes……………. place every four years.

3. Julie (not drink) ………doesn't drink………………. tea very often.

4. Look at this sentence. What (this word /mean) ………………does this word mean……………?

5. The moon (go) …………goes……………. round the earth in about 27 days.

6. Sophia (live) …………lives……………. in London, but she often (spend) ………………spends………. the weekend in the countryside with her parents.

7. Rachel is in New York right now. She (stay) …………is staying……………. at the Park Hotel.

8. Sue (not read) …………………isn't reading……. a book right now. She (watch) ……………is watching…………. TV.

9. They don’t often save money, but at the moment they (save) …is saving……………………. to buy a car.

10. I (see) …………have seen……………. this film already.

11. John and Julie (have) ………have had………………. their car for about a year.

12. She (not take) …… hasn't taken…………………. her driving test yet.

13. Sue (be) ……………has been…………. a tour guide since she left university.

14. (Paul/ever/meet) ………………has Paul ever met………. a famous person?

15. This is the first time we (ever/visit) …have ever visited……………………. your house.

1, speaks

2, drink

3, ...

4, cause

4, live

Sorry tớ ko bít làm 

1.speaks              5.live

2.drink                  6.was

3.open                  7.on

4.too             

2. I don't often.....drink .......... coffee.

3. The swimming pool .......open.........r at 7.30 every morning.

hc tốt

1. The olympic Games (be)..........is............held once every four years.

2. The first olympic Games (take)..........took..............place in Greece in 776

3. People (start)............started.................to use computer about 50 years old

4. What's that noise?

   - The children (play).........are playing...............tug of war

5. What....did... you (do).........do......... last weekend?

   - I (cycle)......cycled.......round the lake with my friends. Then I (watch).................watch.............TV in the afternoon

1.The Olympic Games (be) are held once every four years.

Ở đây mình sẽ giải thích cho các bạn hiểu :

Thế vận hội được tổ chức 4 năm 1 lần => thường xuyên => chia are là phù hợp với ngữ cảnh.

2.The first Olympic Games (take) took place in Greece in 776 BC.

Thế vận hội đầu tiên diễn ra ở Hy Lạp vào năm 776 trước Công nguyên.

=> Đây là hành động đã diễn ra => quá khứ => took

3.People (start) started to use computers about 50 years ago.

Cái này thì quá dễ rồi nhỉ => ago => quá khứ đơn.

4.-What's that noise?

-The children (play) are playing tug of war.

5.-What did you(do) do last weekend?

-I (cycle) cycled round the lake with my friends.

Then I (watch) watched TV in the afternoon.

3/Put the verbs in brackets in the correct form.

1.The Olympic Games (be)....WAS.. held once every four years.

2.The first Olympic Games (take).....TOOK....... place in Greece in 776 BC.

3.People (start).....STARTED...... to use computers about 50 years ago.

4.-What's that noise?

-The children (play)....IS PLAYING... tug of war.

5.-What .....DID..... you(do).....DO..... last weekend?

-I (cycle).....CYCLED.... round the lake with my friends.

Then I (watch)....watched... TV in the afternoon.

mk xin phép lm lại câu 5 nhs , mk quên thêm ed

5.-What .....did..... you(do)..do........ last weekend?

-I (cycle).....cycled.... round the lake with my friends.

Then I (watch)....watched... TV in the afternoon.

 VI. Complete the sentences, using the verbs in present passive form.

1. Cheese_is made___ ( make ) from milk.

2. Many accidents___are caused _ ( cause) by careless driving.

3. A cinema is a place where films_shown__(show).

4. Most of the Earth's surface_is covered__(cover) by water.

5. It's a big factory. Five hundred people_are employed__ ( employ ) there.

6.You can't see the house from the road. It ( surround )is surrounded by trees.

7. The concerts__are usually held____(usually/ hold) at the City Theater.

8. How is this word__pronounced____(pronounce)?

9. A lot of beautiful toys___are made__ (make) from recycled plastic.

10. I___am taken__ ( take) to school by my father every day.                     

1. Cheese is made____ ( make ) from milk.

2. Many accidents are caused ____ ( cause) by careless driving.

3. A cinema is a place where films are shown___(show).

4. Most of the Earth's surface is covered___(cover) by water.

5. It's a big factory. Five hundred people are employed___ ( employ ) there.

6.You can't see the house from the road. It is surounded___ ( surround ) by trees.

7. The concerts are usually held______(usually/ hold) at the City Theater.

8. How is__ this word pronounced______(pronounce)?

9. A lot of beautiful toys are made_____ (make) from recycled plastic.

10. I am taken_____ ( take) to school by my father every day.

1. is made

2. were caused

3. are shown

4. is covered

5. are employed

6. is surrounded

7. are usually holden

8. is this word pronounced

9. are made

10. am taken

Thế vận hội Olympic đầu tiên diễn ra ở Hy Lạp hơn hai nghìn bảy năm trước . Mỗi năm không có chiến tranh trong năm ngày và các cuộc thi đấu thể thao đã diễn ra. Trò chơi được tổ chức trong hơn sáu trăm năm. Sau đó, trong một ngàn năm trăm năm, không có gì được nghe về họ .
Thế vận hội Olympic hiện đại bắt đầu trở lại vào năm 1896. Họ sẽ diễn ra bốn năm một lần. Họ không thể diễn ra ở một đất nước đang chiến tranh và trong suốt hai thế chiến, không có Thế vận hội. Trong các trận đấu Thế vận hội, có nhiều cuộc thi đấu trong nhiều môn thể thao như chạy, nhảy, điền kinh, bơi lội, đấm bốc, bóng rổ, bóng đá và hơn thế nữa.

Put the verbs in brackets in the correct form.

1. The Olympic Games (be) are held once every four years.
2. The first Olympic Games (take) took place in Greece in 776 BC.
3. People (start) started to use computers about 50 years ago.
4.- What’s that noise?
- The children (play) are playing tug of war.
5.- What you (do) did you do last weekend?
- I (cycle) cycled round the lake with my friends. Then I (watch) watched TV in the afternoon.

1.the olympic games (be) are held once every four years 2.the first olimpic games (take) took place in greece in 776 3.people (start) started to use computer about 50 years ago 4.what's that noise? - the children (play) are play tug of war 5.what's you (do) do last weekend

-I(cycle) round the lake with my friends .Then i (watch) watched TV in the afternoons