Sau khi kết duyên, Âu Cơ có mang rồi sinh ra một bọc trăm trứng, nở ra 100 người con hồng hào, đẹp đẽ. Rồi một hôm, Lạc Long QUÂN cảm thấy mình ko thể sống mãi trên cạn bèn từ biệt Âu Cơ. Lạc LOng Quân đưa 50 con xuống biển, Âu Cơ đưa 50 con lên núi.( Để ây dựng cơ nghiệp)

Theo câu truyện trên thì người Việt là con cháu Vua Hùng Vương

3⁸ : 3⁴ = 3^8-4 = 3⁴ = 81

Two people are talking about some common practices in Viet Nam. Put the sentences in the correct order.

____2___ B: Why do they do that?

____1___ A: The fishermen in my village drink fish sauce before they get down to the sea.

____6___ B: It can prevent people from getting cancer.

____4___ B: Interesting. In my area we drink a lot of green tea.

____5___ A: Why green tea?

____3___ A: The sauce gives them strength to stand the cold in water.

\(\frac{9}{12}=\frac{3}{4}=\frac{1}{4}+\frac{1}{4}+\frac{1}{4}\)

1 I was born in afica in 1970.

2 His parents moved back to France when he was five.

3 I didn't meet my daughter last night.

4 They arrived at three o'clock in the afternoon.

5 On Saturday evenings we go out to a concert.

6 He bought a new car a few weeks ago

1. He   must/have to study  harder to pass the final exam .

2. you  must have got carly up yesterday morning but you didn't

3. students in this school must/ have to wear  uniform to school on wendenesdays and thursdays.

4. you must/ have to be more careful with this elephant .

5. I must/ had to phoned her yesterday , but i for got . I must phone her later today .

6. He mustn't go fast at the intersesction.

7.Students must/ have to listen to teacher's explaining carefully .

8.you must/ have to hurry or we'll miss the rain

 Tìm những từ thừa trong các câu sau :

 1/ You can find all much kinds of books , magazines and newspapers here 

 2/ To finding a book is very easy

 3/ The only thing you can do is to by look in the card index

 4/ These cards show the subject and they cards are in alphabetocal order by with both title and author

 5/ And now please have a look at shelves thực ra câu này mình thấy đúng hơn là nên cho thêm 'the' vào trước 'shelves'

6/ These shelves they on the right have there magazines newspapers and dictionaries 

7/ Those shelves on the left library have science books and reference books

8/ And those shelves at the comeback of the library have lot history , geography ,literature books 

mk nhầm câu 2 ý b nha

1)B = {10 ;11 ; 12 ; ... ; 99} có (99-10)+1=90 ( phần tử)

2) a, C= { 2;4;6;8}

    b, L = {12;14;16;18}

    c, C= {25;27;29;31}

3)  

D={21;23;25;...;99} có ( 99 - 21) :2 +1 = 40 (phần tử)

 E={32;34;36;...;96} có (96 - 32) : 2 +1 =33(phần tử)