Give the correct form of the verbs given to finish the sentences :

1. - Have you ever done (do) volunteer work ? / Yes, I (join) joined my school volunteer team last summer .

2. I know a lot about Beijing because I (go) went there last summer.

3. Sit down and watch TV ; I (finish) will finish my work soon before I join you.

4. Have you ridden (ride) into town on your new bike yet ?

V. Each sentence has a mistake find and correct it.

1. How old will Hoa be on her next birthday? (is -> be)

2. Would you like to see a movie with me tonight? (seing -> to see)

3. Nhung’s birthday is on the ninth of March. (in -> on)

4. We won’t have a part next Friday. (having -> have)

5. Today is Thursday, the second of November. (two -> second)

6. Hoang doesn’t have a lot of friends in his new school. (lots -> lot)

7. What is your telephone number, Phuong? (are -> is)

8. Mai will go to Hai Phong tomorrow afternoon. (goes -> go)

9. Who are you talking about? ( talk -> talking)

10. Linh lives with her uncle at 37 Nguyen Trai Street. ( on -> at )

11. My sister is cooking dinner at the moment (cook -> cooking)

12. Put these dirty socks in the washing basket. ( this -> these)

13. Would you like to drink some milk? ( drinking -> drink )

14. My old school is different from my new school (than -> from)

15. Hoa is unhappy because she misses her parents and friends (so -> because)

16. My bedroom is bigger than my sister’s (more bigger -> bigger)

Mình biết làm nhưng trình bày ra dài lắm

uk cảm ơn bạn,nhưng tết tây thôi mà đâu cần phải chúc

đợi tết nguyên đán đi
 

1. The last time we saw her was on Christmas Day

=> We have not seen her since Christmas Day.

2. I haven't eaten this kind of food before

=> This is the first time I have eaten this kind of food.

3. It started raining an hour ago

=> It has rained for an hour.

4. We haven't visited my grandparents for two months

=> The last time we visited my grandparents was two months ago.

5. I have studied English for three years

=> I began studying English three years ago.

6. My brother hasn't seen his best friend for nearly five years

=> It's nearly five years since my brother last saw his best friend.

7. When did you start learning English ?

=> How long have you learnt English?

8. Jane is as tall as her older sister

=> Jane is the same height as her older sister.

9. These houses are not as large as those houses

=> Those houses are larger than these houses.

10. Your backpack is not the same as mine

=> My backpack different from yours.

11. Ba began collecting stamps three years ago

=> Ba has collected stamps for three years.

12. We started living here twenty years ago

=> We have lived here for twenty years.

13. It's five years since I last saw Nam

=> I haven't seen Nam for five years.

14. The last time she visited us was four months ago

=> She hasn't visited us for four months.

15. I know Susan, I first met her in 2006

=> I have known Susan since 2006.

16. Minh has a digital camera. He bough it in 2001

=> Minh has had a digital camera since 2001.

17. Mai plays the piano. She started when she was ten years old

=> Mai has played the piano since she was ten years old.

18. Barbara is in Ha Noi now. She arrived there five months ago

=> Barbara has arrived Ha Noi for five months.

19. They started living here last month

=> They have lived here since last month.

20. My shoes are different from yours

=> My shoes are not the same as yours.

|x -5|=|-7|

|X-5|=7

=> X-5 \(\in\) {7; -7}

Nếu x-5=7

x=7+5

x=12

Nếu x-5=-7

x=-7+5

x=-2

Vậy x \(\in\) {12; -2}

Điền vào chỗ trống các từ thích hợp:

1. Do you know to play golf ?
2. He always rests for half an hour after lunch.
3. He loves his dog very much. He spends all his free time with it.
4. My family has a lot of hens. I like helping my mom to collect their eggs every morning

Ta có : n²+n+1=n(n+1)+2 la so chan nen ko co tan cung la5 

Để có tận cùng là 0 thì n(n+1) co chu so tan cung la 8 

Ma 2 so lien tiep nhan voi nhau ko bao gio co so tan cung la8 

Suy ra : n(n+1)+2 ko chia het cho 8 

Vậy ko tồn tại số tự nhiên N

fill in each blank with the correct work:some or any

mai: i'm really hungry what did you have for lunch

nam:Nothing!i wanted to make some pancakes but i dont know how to make any one

mai:ok we can have some egg too