1. What are you going to do this Saturday ?

I’m going to play tennis this Saturday.

2. Where do your sister and her family live ?

My sister and her family live on Tran Phu Street.

3. How much cheese is there in the fridge ?

There is some cheese in the fridge.

4. How many eggs do you want for your breakfast ?

I want three eggs for my breakfast.

5. What time do they often have dinner?

They often have dinner at 8 every evening .

6. How often does she go to the movies ?

She goes to the movies twice a month.

7. How does he go to work ?

He goes to work by car.

8. What color are her eyes ?

Her eyes are brown .

9. How long are you going to stay in Hue ?

I am going to stay in Hue for 5 days .

10. Where is he from ?

He is from Australia

1.There are forty students in my class.

=> My class has forty students.

2. The flower garden is in front of the house.

=> The house is behind the flower garden.

3. We usually ride to school.

=> We usually go to school by bike.

4. The school is big.

=> It is a big school.

Đặt câu hỏi cho thành phần được gạch dưới :

1. Linh has milk and eggs for breakfast .

=> What does Linh have for breakfast?

2. My father has lunch at home .

=> Where does your father have lunch?

3. Mai’s brother wants a glass of orange juice .

=> What does Mai's brother want?

4. Miss Thu needs a kilo of tea.

=> How many kilos of tea does Miss Thu need?

5. Dung wants five boxes of chocolate.

=> How many boxes of chocolate does Dung want?

6. He goes to the cinema once a week.

=> How often does he go to the cinema?

7. Lan is going to live in China.

=> Where is Lan going to live?

8. They are going to bring me some flowers.

=> What are they going to bring me?

9. Miss Hoa is going to stay in a hotel tonight.

=> When is miss Hoa going to stay in a hotel.

10. The Mekong River is the longest river in Viet Nam.

=> Which is the longest river in Viet Nam?

11. He speaks French.

=> Which language does he speak?

12. I am from Japan.

=> Where do you from?

13. A kilo is twenty thousand dongs .

=> How much is a kilo?

14. She is going to stay at home tomorrow.

=> What is she going to do tomorrow?

1. What you (do ) are you doing now ?- I (listen) am listening to music.

2 My mom always goes (go)to work early.

3. Do you often (eat) eat vegetables for your breakfast ?

4. Are there (be)14 classrooms in your school ?

5. They (not play) don't play in the evenings .

6. She likes (read) reading but she (not read) isn't reading now.

tổng số bè nhất có 3 chữ số và số lơn nhất có một chữ số là :100+9=109

\(\dfrac{1}{2.3}+\dfrac{1}{3.4}+\dfrac{1}{4.5}+...+\dfrac{1}{x\left(x+1\right)}=\dfrac{299}{600}\)

\(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{5}+...+\dfrac{1}{x}-\dfrac{1}{x+1}=\dfrac{299}{600}\)

\(\dfrac{1}{2}-\dfrac{1}{x+1}=\dfrac{299}{600}\)

\(\dfrac{1}{x+1}=\dfrac{1}{2}-\dfrac{299}{600}\)

\(\dfrac{1}{x+1}=\dfrac{300}{600}-\dfrac{299}{600}\)

\(\dfrac{1}{x+1}=\dfrac{1}{600}\)

=> x + 1 = 600

x = 600 - 1

x = 599

Vậy x = 599

Chọn ra 1 điểm bất kỳ trong 15 điểm. Nối điểm đó với 14 điểm còn lại, ta được 14 đường thẳng.

Cứ làm như vậy với 15 điểm thì số lượng đường thẳng tạo thành là:

15 . 14 = 210 (đường thẳng)

Nhưng như vậy thì mỗi đường thẳng đã được tính 2 lần nên số đường thẳng thực tế được tạo thành là:

210 : 2 = 105 (đường thẳng)

Vậy từ 15 điểm trong đó không có 3 điểm nào thẳng hàng thì vẽ được 105 đường thẳng

41.Don't throw waster in the street.

42.Your mother's sister is your aunt.

43.It's cold and it snows in winter. ( sunny, windy, cool, cold )

44.The monkey is on the car. ( near, under, next to, on )

45.at the meeting/ won't/ be/ tomorrow./ Mr Smith

=> Mr Smith won't be at the meeting tomorrow

46.Dolphins can't live in polluted water, but a lo of the sea is polluted.

47.Don't eat too many ice-cream before going to bed.

48.Which sentence is correct?

A.What weather do you like? B.What's weather do you like?

C.What is weather you like? D.What the weather are you like?

49.Visitors/ 10 p.m/ can's stay in/ the hospital/ after

=> Visitors can't stay in the hospital after 10 p.m.

50.his small field/ vegetable/ in/ a few/ grows/ This farmer

=> This farmer grows a few vegetables in his small field.

51.Could you bring me a bbar of chocolate tomorrow?

52.How is the new apartment? - Well, it's quite big!

53.Children like reading these comics because they're interesting ( boring, interesting, funny, cheap )

54...................... - Bread, please.

A.Do you like bread for dinner? B.What do you like for dinner?

C.What do you would like for dinner? D. Would you like bread for dinner?

55.cooking and/ Wash vegetable/ eating./ and fruits/ before

=> Wash vegetable and fruits before cooking and eating.

56.Where do/ playing/ your students/ practise/ the piano?

=> Where do your students practise playing the piano?

57.Bicycle is one of the cheapest means of transportation.

58............? - She speaks English.

A.Which languare does she speak? B.Which languare can she speak?

C.Which languare is she speaking? D.Which languare is she speak?

59.This woman/ her daughters./ than all of/ has/ more money

=> This woman has more money than all of her daughters.

60.Do your/ classmates do/ in the/ their homework/ library?

=> Do your classmates do their homework in the library?

2⁶ . x = (-2)¹⁰ 

=> 2⁶ . x = 2¹⁰

=> x = 2¹⁰ : 2⁶

=> x = 2⁴

=> x = 16

- Cụm danh từ:

+ Cụm danh từ là loại tổ hợp từ do danh từ với một số từ ngữ phụ thuộc nó tạo thành.

+ Cụm danh từ có cấu tạo phức tạp hơn và có ý nghĩa đầy đủ hơn một mình danh từ, nhưng hoạt động trong câu giống như một danh từ.

- Cụm động từ:

+ Cụm động từ là loại tổ hợp từ do động từ với một số từ ngữ phụ thuộc nó tạo thành.

+ Cum động từ có cấu tạo phức tạp hơn và có ý nghĩa đầy đủ hơn một mình động từ, nhưng hoạt động trong câu giống như một động từ.

Gọi d ∈ ƯC(12n + 1; 30n + 1) (d ∈ N)

⇒ (12n + 1)$⋮d\; và\; (30n\; +\; 1)⋮d$

⇒ 5(12n + 1)$⋮d\; và\; 2(30n\; +\; 1)⋮d$

⇒ (60 + 5)$⋮d\; và\; (60\; +\; 2)⋮d$

⇒ [(60 + 5) - (60 + 2)]$⋮d$

⇒ 3$⋮d$

⇒ d ∈ Ư(3)

⇒ d ∈ {1; 3}

Vì (12n + 1)$⋮̸3\; nên\; d$≠ 3

⇒ d = 1

⇒ ƯC(12n + 1; 30n + 1) = {1}

⇒ ƯCLN(12n + 1; 30n + 1) = 1

Vậy với mọi n ∈ N thì ƯCLN(12n + 1; 30n + 1) = 1 (đpcm)