1. is → has been

2. considered → is considered

Because of the increasing development of the Internet, it has become part of everyday life.

Là quả hạch.

Đặc sắc về nghệ thuật của văn bản “Ý nghĩa văn chương” là gì?

There are many tribal villages in Vietnam.

Do you mind closing the door ?

No of course not

Please do

Please go ahead

I'd prefer you didn't

`1/4 . 2/6 . 3/8 ... . 30/62 .31/64 =2^x`

`-> (1.2.3....30.31)/(4.6.8....62.64)=2^x`

`-> (1.(2.3...31))/(2.(2.3.4...31).32)=2^x`

`-> 1/(2.32)=2^x`

`-> 1/64=2^x`

`-> 1/(2^6)=2^x`

`-> x=-6`.

1. Is this the first time you have been to London ?

2. We have not gone to Spain for three years.

3. The old house on the plateau that we visited was magnificent.

4. In spite of the heavy traffic, Ba went to school on time.

5. Despite my mother's age, she still works hard.

6. Despite taking the first train, she went to the meeting late.

7. In spite of being ill, she went to school.

8. The man whom I spoke to last night comes from Australia.

9. Nguyen Du, who wrote the story of Kieu, was a famous poet.

10. Viet Nam, which export rice to other countries, is in Asia.

`7/10=2/10 +5/10=1/5+1/2`

`10/21=`3/21+7/21=1/7+1/3`

`7/8=1/8+2/8+4/8=1/8+1/4+1/2`