a) Ba :      Hello, Mr. Minh.

                  This is Nam

Mr. Minh : Hello, Nam. How old are you?

Nam :        I am eleven

b) Phong : Hello, Miss Chi.

                   This is Thanh.

Miss Nhi :Hello Thanh. How old are you?

Thanh :    I am twelve years old.

c)Linh :  Hi. I am Linh.

Phong : Hi, Linh. I'm Phong. How old are you ?

Linh :     I am fifteen years old.

d) Minh :     Good morning, I'm Hoa.

Miss Hoa : Good morning. How are you?

Minh :         I am fine, and you.

                   Miss Hoa, This is Lan Anh.

Miss Hoa : Hello, Lan Anh. How old are you?

Lan Anh :   I am nine years old.

e) Children : Good afternoon, Mr. Tan.

Mr. Tan :       Good afternoon, children. How are you?

Children :     I am fine. Thank you.

                     Mr. Tan, This is Long.

Mr. Tan :      Oh. Hello, Long. How old are you?

Long :          I am eleven years old.

a) Ta có công thức: *Các chữ số tận cùng là 0;1;5;6 khi nâng lên luỹ thừa bất kì thì chữ số tận cũng vẫn không thay đổi. Vậy nên \(5^{2016}\) có chữ số tận cùng là 5

Các chữ số tận cùng là 4;9 khi nâng lên luỹ thừa bậc lẻ thì chữ số tận cũng vẫn không thay đổi. Vậy nên \(2^{2017}\) có chữ số tận cùng là 2

Từ đó suy ra: \(B=5^{2016}+2^{2017}=...5+...2=...7\)

vậy chữ số tận cùng của B là 7

b,c Tương tự

1. How far is it from her school to her house?

It's ( about ) 100 meters

2. How far is it from the post office to the movie theater?

It's ( about ) two kilometers

3. How far is it from your house to Ben Thanh market?

It's ( about ) five kilometers

4. How far is it from the bookstore to the restaurant?

It's ( about ) 500 meters

5. How far is it from Lan's house to the zoo?

It's ( about ) three kilometers

6. How far is it from your school to the library?

It's ( about ) one kilometer

It's English because it's very interesting

There are four: My father, my mother, my brother and me

P - H - U - O - N - G.  Pi - Ết - Diu - Âu - En - Ri

Câu D đúng rồi đấy. Vì Hardly....when chỉ dùng cho thì quá khứ hoàn thành với quá khứ đơn. Khi Hardly đứng đầu câu thì phải đảo ngữ.

Hardly had we arrived at school yesterday when we were informed that there was no class due to a sudden power cut.

^{\(\sqrt{41}\)}

 My hobby is (1) collecting books. I collect books whenever I have more need some books. I collect many kinds of books such as (2) collecting story books or (3) others. I am learning at school, you know, Maths, History, Geography, Biology: and books about (4) them.

          I buy books from (5) the bookstore near my house, and some other (6) stores . I also get books from (7)the library .

          I collect books because I would like to (8) read from book help me broaden (9) my knowledge.

          In the future, I try to make my collection (10) books.  I would open (11) the world of my own.

Đoán thế thôi. Sai thôi nhé.