a) ( x - 3256 ) + 2589 = 12587- 2658

 ( x - 3256 ) + 2589 = 9929

  x - 3256                 =   9929 - 2589

 x - 3256                  =       7340

 x                             =  7340 + 3256

x                              =      10 596

đề bài là khoanh vào từ có trọng âm khác hả bn

7. C

8. B

9. A

10. A

Ta có :

Bởi vì 

nên suy ra: 15¹⁵ > 81³.125⁵

4. a. are meeting

5. c. write

6. c. arrives

10 + 999 = 1009

Ta có:

2³⁰ = (2³)¹⁰=8¹⁰

3²⁰ = (3²)¹⁰=9¹⁰

Ta thấy 8¹⁰ < 9^{10 n} nên suy ra  2³⁰ < 3²⁰

1. b. am writing

(Thì HTTD: I + am + V-ing)

2. a. goes

(Chủ ngữ là số ít go thêm es => goes)

3. b. am learning

(Thì HTTD)

Fifty years ago there wasn't a shopping mail in my town. There (1) ......was......... only one cafe. There was a museum then. There (2) .....weren't............ any buses, but there (3) .....were...........trams.Now there (4) .......are.............. lots of cafe. There (5) .....is.............. a shopping mall, but there (6).......isn't...............a museum. There are buses now, but there (7) ..........aren't.............. any trams.

If you didn’t help me, I couldn’t find the way to school.

If it weren’t for her busyness, she would come to the class.

 If you don’t shut up, you can’t follow the lesson. 

If it weren’t for the rain, we would have had a good picnic.