have to

A có giá trị nguyên.

`<=> x vdots x+5`

`<=> (x+5)-5 vdots x+5`

`<=> -5 vdots x+5`

`<=> x+5 \in {-5;5;-1;1}`

`<=> x \in {-10;0;-6;-4}`.

Đại Bình nguyên Bắc Mỹ

1. C

2. A

3. D

4. A

5. C

1. is knocking

2. not to make

3. reading

4. visited

5. has lived

6. destruction

7. beautiful

8. well

9.  boring

10. improve

- Em cảm ơn ạ.

- Vâng, tại em chưa chú ý object "a plumber".

1. will have

2. was made

3. was waiting

4. repaired

5. wouldn't be

6. has worked

7. was built

8. was watching

9. opening

10. were

11. were

12. were having

13. haven't received

14. stay

15. is being built

1. performance

2. terribly - pronounce

3. memorize

4. knowledge

5. writing

6. embarrassment

7. Shaking

8. compared

9. experimental

10. unexpectedly

1. Unless I leave now, I will miss the rain.

2. He suggested that I should bring my brother to the party.

3. I haven't seen my uncle since 1999.

4.  Despite driving carefully, he crashed his car.

5. The bicycle was too expensive for me to buy.

6. If Mr. Ba weren't too old, he could not continue the work.

7. This is the most romantic film that I have ever seen.

8. It is expected that some major reforms will be suggested by the report.

9. It was such an exciting match that all the fans shouted loudly.

10. The harder you practice, the better results you will have.

11. It is not worth asking George to help.

12. This is the first time I've been to Paris.

13. Someone must have forgotten to lock the door.

14. It can’t be denied that she has a beautiful voice.

15, You need to finish the work today.