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 )

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 student (look up) the new word right now

=> are looking up

2) He (play) games at the moment

=> is playing

3) At present, that author (write ) a historical novel

=> is writing

4) She (play) tennis once a day

=>plays

5) She sometimes (buy) vegetables at this market

=> buys

6) I (read) books right now 

am reading

7) My mother ( cook) some food in the kitchen at the moment. She always (cook) in the morning 

cooking / cooks

8) Sarah often (work) late at the office

works

9) Lan ( not drink) coffee often 

doesn't drink

10) It usually (take) me 20 minutes to go to work 

takes

11) The olymic games (take) place every four years

takes

12) My brother ( speak) English very well 

speaks

13) How often (you/ play) tennis ?

do you play

14) The swimming pool near my house (open) at 6.00 every morning 

opens

Lưu ý

7) My mother ( cook)is cooking some food in the kitchen at the moment. She always (cook)cooks in the morning 

11) The olymic games (take)take place every four years

1.The student (look up) is looking up the new word right now

2.He (play) is playing game at the moment

3.At present,that author (write) is writing a historical novel

4.She (play) plays table tennis once a day

5.She sometimes (buy) buys vegetable at this market

6.I (read) am reading books right now

7.My mother (cook) is cooking some food in the kitchen at the moment.She always (cook) cooking in the morning

8.Sarah often (work) works late at the office

9.Lan (not drink) doesn't drink coffee often

10.It usually (take) takes me 20 minutes to go to work

11.The olymic games (take) takes place every four years

12.My brother (speak) speaks English very well

13.How often (you/play) do you play tennis ?

14.The swimming pool near my house (open) opens at 6.00 every morning

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 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.

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.

1.is
2.took
3.started
4.are playing
5.did, do
cycled, watched

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

Complete the sentences using the following verbs:

CAUSE CONNECT TAKE

3. Bad ( danh từ ) driving .causes.. many acidents

5. The Olympic Games .takes.. place every four years

6. The Panama Canal .connects.. the Atlantic and Pacific oceans