1. In some countries, tipping is a usual thing

2. Tipping is not a custom in Viet Nam, so you don't have to tip if you don't want to

3. poverty, Lang Lieu couldn't buy any special food

11. The boy of whom you made fun of is my cousin

12.this matter, which you should pay attention to, is of great importance

13. The woman to whom you gave place on the bus lives next door to me

14. This snake, which you are afraid of, is venomless

15. The examination in which I was successful  laste two days

16. These children, of  whom she is taking care, are orphans

17. The two young men with whom you are acqunted are not good persons

18. This is the result of our work which i'm pleased with

19. There is a ' No Parking' sign of which I do not take notice

20. Mr. Brown is the man to whom I'm responsible for my work 

1.will be on sale soon.

2.Underground isn't as good as River Run.

3.he didn't think he would have a job like he has now.

4.was played by a lot of people in Japan.

5.help him make new games.

1. this is a small house

2. This is a large living room

1.food bank

2. donate

3.volunteers

4.homeless

5. charity

6.endless

7.confidence

8.meaningful 

9. helpful

10.orphanage

1. Nam said " I am told to be at school before 7 o'clock"

---> Nam said he was told to be at school before 7 o'clock

2. The said "All the students will have a metting next week"

--->  They said all the students would have a meeting the following week

3. The teacher said "All the homework must be done carefully"

---> The teacher said all the homework had to be done carefully

4. Hoa said "I may visit my parents in the summer"

---> Hoa said she might visit her parents in the summer

5. Her father  said to her "You can go to the movie with your friend"

--->Her father told her that she could go to the movie with her friend

6. The teacher said  to the students "We can collect old book for the poor students"

--->The teacher told the students they could collect old book for the poor students

x=\(\pm\)\(\sqrt{49}\)

<=> x=\(\pm\)7

đổi: 63cm=0,63m

chiều dài hình chữ nhật là:

1,95-0,63=1,32(m)

D

D