Cho a = log 2 5 , b = log 2 9 . Khi đó P = log 2 40 3  tính theo a và b là  

A.  P = 3 + a − 2 b

B.  P = 3 + a − 1 2 b

C.  P = 3 + a − b

D.  P = 3 a 2 b

Điền phân số thích hợp vào ô trống: Phân số đảo ngược của phân số  4 7 là ...

A.  4 9

B.  17 4

C.  7 4

D.  14 9

1. the summer vacation ... for almost three months

a. longs b.lasts c.is

2. my sister loves .... stamps

a. collect b. to collect c.collecting

3. i ... come and see you sometime

a. will b.am c. don't

4. what will you do ... your vacation ?

a. to b.in c.during

5. my brother likes watching soccer . ....

a. i like,too b.so like c.i am, too

6. mr.tuan has ... days off than mr.jones

a.many b.less c.fewer

7.jane is ... beautiful than her sister

a.more b.the most c.fewer

8.thanh helps chilren to learn. she is a ...

a.doctor b.musician c.teacher

9. which vietnamese vacation is ....

a. the longest b.long c.longest

10. mr.jones repairs machines in a factory. he's a ...

a. a shop assistant b.a mechanic c. farmer

11. at recess, ... activity is talking

a. more popular b. most popular c.the most popular

12.this book is ... interesting of the three

a.most b.the most c.more

13.every morning, t wake up and have my ...

a. dinner b.lunch c.breakfast

14.they have to work very hard on their farm

a.should b.must c.need

15.do vietnamese students have more fewer vacations than american ... ?

a.students b.vacations c. farmers

16. ... a look at this picture

a.take b. give c.do

17.hurry or you'll be late ... school

a.with b.for c.at

18.my homework ... about two hours each day

a.takes b.has c.gives

19.our summer vacation starts in june. it ... for almost for two months

a. happends b.takes c.lasts

20. what do you do ... the vacation ?

a. during b. while c. when

a)A=n²+n+1

=n.(n+1)+1

Vì n;n+1 là 2 số tự nhiên liên tiếp nên: n.(n+1) chia hết cho 2 hay n.(n+1) là số chẵn

=>A=n.(n+1)+1 là số lẽ không chia hết cho 2

1. Bod/never/see/movie/before

Bod never goes to see a movie before.

2. Minh/live/Hanoi/for five years

Minh lived in Hanoi for five years.

3. Mr Smith/teach/this school/he graduated/1995

Mr Smith taught at this school and he graduated in 1995.

4. you/ receive/any letter/your parents/yet?

Did you receive any letters your parents yet?

5. how many stories/she write/so far?

How many stories did she write so far?

6.She/ absent/ school because/her liziness

She was absent from the school because of her liziness.

7. I/ see/play/ three times/because it/ interesting

I go to see a play three times a week because it is interesting.

8. people/plant/trees/public areas

People should plant trees at the public areas.

9.I/not/go/school/because/rain/heavily/yesterday

I didn't go to school because it rained heavily yesterday.

10.how long/you/study/school?

How long do you study at school?

1. What do you do?

~> What is your iob?

2. How much is the hat?

~> How much does the hat cost ?

3. Nam works more hours than Lan.

~> Lan works fewer hours than Nam,doesn't Lan ?

4. Spring has more flowers.

~> There are more flowers in the spring.

5. The fims are very boring.

~> What boring films !

6. The weather is very bad.

~> What bad weather!

7. It's a very pretty room.

~> What a pretty room !

II- Chọn A, B, C hoặc D

1. Do you work. . . . . . . . . . hours than Hoa?

A. few B. less C. lesser D. fewer

2. Which sentence iss correct? . . . . . . . . . . . . . .

A. How much hours a week do you work?

B. How much hour a week do you work?

C. How many hour a week do you work?

D. How many hours a week do you work?

3. Which sentence is wrong? . . . . . . . . . . . . . . .

A. Lan helps students study.

B. Lan helps students to study.

C. Lan helps students studying.

D. Lan helps students with their studies.

gv tra loi cau nao thi online math chon cau day

9248 - x : 4 + 2106 = 8502

9248 - x : 4            = 8502 -2106

9248 - x : 4            =  6396

          x : 4            = 9248 - 6396

          x : 4            = 5852

          x                 = 5852 x 4

          x                 =  23508

1/ What time the concert will start?

~>will concert

2. I see you at 8 tomorrow morning. Don't be late.

~>will see

3. How long will the play last? Till nine or half and past nine.

~>0

4. What is your date of birth? November twetyth.

~>the twentieth

5. Are you like your school? Yes, It's very beautiful.

~>Do

6. Don't worry. You will have lot of friends.

~>lots

7. I live with my parents on 88 Tran Hung Dao street.

~>at

8. How old will he be in his next birthday?

~>be he

9. I classes start at seven o' clock.

~>start classes

10. This is a girl nice.

~>nice girl

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