1. Here/ photo/ my family/ and/ let/ me/ tell/ you/ us .
-> Here is the photo of my family and let me tell you about us.
2. Father/ mechanic/ . He/ work/ factory/ suburb .
-> My father is a mechanic. He works in the factory in the suburb.
3. He/ usually/ go/ work/ motorbike/ morning/ so he/ not free/ every morning .
-> He usually go to work by motorbike in the morning so he isn't free in every morning.
4. Please write/ me soon/ and tell/ your/ family.
-> Please write to me soon and tell me abput your family.

ƯCLN (a,b) = 16 va b=96. Tìm a

theo bài ta có a chia hết cho 16 giả sử a = 16.x. và 96 chia hết cho 16= 6

suy ra 6 và x phải là hai số nguyên tố cùng nhau vậy b là các số lẻ và không chia hết cho 3

vậy x = 5; 7; 11; 13; 17; 19; 23; 25......

khi đó các giá trị của a tương ứng là a = 80; 112; 176; .......

549 nhe ban

**** mình nhé

\(\left(1-\sqrt{x}\right)\left(1+\sqrt{x}+x\right)=\left(1-\sqrt{x}\right)\left(1+\sqrt{x}\right)+x\left(1-\sqrt{x}\right)\)

\(=1-x+x-x\sqrt{x}\)

\(=1-x\sqrt{x}\)

2. Villages are .............quieter ............than towns.(quiet)

3.I learn E so that I can communicate with foreigners.

=> I learn E so as....to communicate with foreigners.....

À để giải lại cho:

Có

VD: 4 và 9 là hợp số

4= 2²

9= 3²

ƯCLN ( 4 ; 9 )= 1

Vậy 4 và 9 là hai số nguyên tố cùng nhau!

I .chọn đáp án đúng

1. She bought (to he son / for her son / her son ) a new coputer .

2 . Yesterday ( It was /was / is / it is ) a nice day

IV. using the information in brackets , complete the questions for the given answers.

1; A --WHEN ARE YOU GOING TO BUY-- a new bicycle ?

B; Next week . I'm going to buy a new bicycle next week.

2;A; --WHET ARE YOU GOING TO PAY--for it ?

B; With my procket money. I'm going to pay winh my pocket money.

3; A---WHEN DID YOU HAVE---your old bike ?

B; Five years . I had my old bike for five years.

4;A ----HOW OFTEN DO YOU RIDE--your bike ?

B; Every day. I ride my bike every day.

5;A---HOW DO YOU ALWAYS GET ---to school ?

B; I always ride my bike . I always get to school by riding my bike .

6; A -DID YOU BUY--your bike to school today ?

B; Yes. I'm going to ride my bike to school tomorrow.

7; A--HOW IS--your bike to school today ?

B; It had a flat tyre . Because it had a flat tyre .

8; A--DOES YOUR BIKE HAVE---a comfortable seat ?

B; Yes. it does. My bike has a comfortable seat.

9;A --WHICH BICYCLE DO YOU HAVE ---?

B; A five-speed . I have a five-speed bicycle.

10;A -HOW LONG DID HE GET--his new bike ?

B; Two weeks ago. Nam got his new bike two weeks ago

1. She (ride) a horse before.

-> rode

2. Mary (ring) hours and hours ago.

-> rang

3. He wrote four best sellers before he (be) twenty years old.

-> was

4. The last time it (rain) was 3 years ago.

-> rained

5. We stepped outside the front door and it (began) to rain.

-> began

6. It started to rain at 2 o'clock and it still (rain).

-> has been still raining/ is still raining

7. Why do you watch the milk (boil) over?

-> boiling

8. I (walk) along the street when I suddenly (feel) something hit me in the back. I (not know) what it was.

-> walked - felt - don't know

9. Where is Tam? He said he (be) here at 4.30

-> was