Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Bài 1: First task:
Let \(x\) be the number of sparrows on the first lamp post at first. (\(x\) is a positive integer).
\(\Rightarrow16-x\)is the number of sparrows on the second lamp post at first.
We have: \(x-2+3=16-x+2-3\Leftrightarrow2x=14\Leftrightarrow x=7\)
Hence there are 7 sparrows on the first lamp post at first, 9 sparrows on the second lamp post at first.
Bài 2: Second Task
We can find 2 students who were born on the same day.
There are 30 days in April and 31 students were born on that month. Apply the Dirichlet 's theorem, we can ensure that threre exists at least one day where 2 students were born.
chuyển sang câu phủ định
1 she feeds the animals .-she...DOESN'T FEED...the animals
2 we take photos - we...DON'T TAKE... photos
3 the boys have two rabbits- the boys...DON'T HAVE...two rabbits
5 simon can read english books- simon....CAN'T READ..... english books
6 he listens to the radio every evening - he .....DOESN'T LISTEN...the radio every evening
7 anna is the best singer of our school -anne ..IS NOT..the best singer of our school
8 the children are at home - the children ...ARE NOT.at home
chuyển sang câu phủ định
1 she feeds the animals .-she...does't feed...the animals
2 we take photos - we..doesn't take.... photos
3 the boys have two rabbits- the boys..don't have....two rabbits
5 simon can read english books- simon...can't...... english books
6 he listens to the radio every evening - he ...doesn't listen.....the radio every evening
7 anna is the best singer of our school -anne .is not...the best singer of our school
8 the children are at home - the children ..are not..at home
1. Won't play
2.Are/
3.Will/go
4.Eats
5.Are doing
6.Doesn't live/lives
7.Is singing
8.often goes
9.Is sleeping
10.???
11.Are not doing/are watching
12.Doing/Is looking for
13.Is
14.Are working?
15. Has/is having
16.Is(?)
17. Will get
18. Is having
19. Are
20. Is
(Có mấy câu bạn ko ghi rõ nên sai đừng chửi mình ;-;)
Phòng ngủ đầu tiên là của ông bà Smith, phòng thứ hai là Tom, phòng thứ ba là Mary, và phòng thứ tư là Anne. Trong phòng ngủ của Anne cũng có một chiếc giường trẻ em, nhưng không có em bé nào sống ở đó. Khi bạn bước vào nhà Mr Smith, phòng bên trái là phòng khách và phòng bên phải là phòng ăn.
Give the correct form of the verd in the brackets.
1. Minh(be) was tired when I (see) saw him yesterday
2. Yesterday, I (get up) got up at 6:00. Then I (have) had an enormous breakfast at 6.30. I (go) went to work at 7.00 and (come back) came back home at 5p.m
3. It (rain) rained alittle last summer
4. My baby (be) was happy yesterday
5. The train (stop) stopped a few minutes ago
6. I (not eat) don't eat anything this morning. Now I am hungry
7. Was Tom (visit) visit his friends last Sunday ?
8. Where did you (spend) spend your holiday last summer ?
9. There (be) were a lot of snow last winter
10. How many books did you (read) read last month ?
11. We (not be) weren't in Ha Long Bay last holiday
12. Tom (not play) didn't play football yesterday morning. He (have) had to go to school
13. When did you finish your homework ? - Last night
14. When I (be) were a child, I often (go) went to the farm with my parents
15. I (be) were very good at Math and English when I (be) were at school
Give the correct form of the verd in the brackets.
1. Minh was tired when I saw him yesterday
2. Yesterday, I got up at 6:00. Then I had an enormous breakfast at 6.30. I went to work at 7.00 and came back home at 5p.m
3. It was rainning a little last summer
4. My baby was happy yesterday
5. The train stopped a few minutes ago
6. I am not eating anything this morning. Now I am hungry
7. Did Tom visit his friends last Sunday ?
8. Where did you spend your holiday last summer ?
9. There were a lot of snow last winter
10. How many books did you read last month ?
11. We weren't in Ha Long Bay last holiday
12. Tom didn't play football yesterday morning. He had to go to school
13. When did you finish your homework ? - Last night
14. When I was a child, I often went to the farm with my parents
15. I was very good at Math and English when I was at school
find and correct the mistakes
how about to have a picnic in the mountain on Sunday?
to -> going to
their students usually play soccer when there is warm
there ->the weather
my brother is goes to stay in London for a month
goes -> going
the Thompsons go to the park about twice times a week
times -> bỏ
the weather often is hot and sunny in the summer
often is -> is often
how much rice and how many beef do you want
many -> much
she'd like a dozen eggs and any vegetables
any -> some
can you to go to the supermarket for me,Hoa
for -> with
we need eight hundred gram of meet
gram -> grams
what would you like buying at the canteen
like buying -> like to buy
1. A. the smaller B.the smallest C.smaller D. smallest
2.A.in B.of C.with D.on
3.A.speaking country B. speak countries C. speak country D. seaking countries
4.A.but B. then C. because D.and
5.A.difficult B.different C.difference D.differing
6.A when B.what time C. what D. which
7.A. the second B. the two C. the next D. the near
8.A.when B.how C. where D.what
1 CẶP THỎ MÌNH ĐOÁN THẾ .