dùng dạng đúng của động từ trong ngoặc

1. he is a (help)....helpful....person

2. my tooth is very(pain).......painful....now

3.clean teeth are (health).......healthy.....teeth

4. you should brush your teeth(regular).......regularly.....

5. we are(worry)........worried......about the final exam

6. she always washes and irons her clothes(careful)......carefully.....

7. i'm(scare)......scared....of hearing the ghost stories

8. the people here are very (friend).....friendly.....

Sắp xếp:

1. do / What time / go /to / you / school/?

What time do you go to school?

2. job / her / What / is / ?

What is her job?

3. orange juice / my / is / favourite / drink / ?

Orange juice is my favourite drink.

4. like / I'd / bread / some.

I'd like some bread.

Chọn từ thích hợp:

1. It's time (for / at / on) ................. lunch.

2. They get (on / up / in) .............. at six o'clock.

3. He is ( a / the / an) ....................... engineer.

4. She goes to work ( to - from / from - on / from - to) .................. 7.30 a.m ................... 4.30 p.m.

Ta có : n(n+1)(2n+1)

= n(n+1)(n+2+n-1)

= n(n+1)(n+2)+(n-1)(n+1)n 
Ta thấy n(n+1)(n+2) và (n-1)(n+1)n là ba số tự nhiên liên tiếp nên chia hết cho 2 và chia hết cho 3.

Do đó n(n+1)(n+2)+(n-1)(n+1)n chia hết cho 2 và chia hết cho 3

Mà ƯCLN(2; 3) = 1 nên tổng trên chia hết cho tích (2.3) = 6

Suy ra đpcm   

1- I am interested ............in........... reading books.

2- She is tired .............of........... living in the city.

3- This restaurant is famous .............for.......... Chinese food.

4- The ambulance will be there ............in.......... a bout 5 minutes.

5- Bobby started school ...........at............ the age of five.

6- I am very keen ..............on........... music.

7- Na got up late this morning because her alarm clock didn’t go ...........off..........

8- I’m looking forward .............to........... seeing in June.

9- Could I help you ..........with........ your bag?

10- They are traveling to the airport..............on........... a bus.

Hoàn thành cuộc đối thoại:

a. What was the trip like?

b. Where did you go last summer?

c. Where is your hometown?

1. A: Is Ha Noi your hometown?

B: No , it isn't

A: .......................................Where is your hometown?.....................................

B. It is Nam Dinh Province.

2.

A: .....................Where did you go last summer?....................

B: I went to the seaside.

A: Did you like the trip?

B: Yes, It was fantastic.

3.

A: What's that?

B: It's a photo of Ha Long Bay.We were there last weekend.

A: ..............................What was the trip like?............................

B: It was wonderful.

1 Does your sister practise the piano after school ?

2 This chocolate bar is more delicious than that one .

3 My sister is a student . She is mine ....... years old . (là sao bn?)

4 He enjoys school very ....much...

5 There's a dishwasher in my kitchen . You don't have to wash the dishes after the meals .

6 It's the ...... restaurant in town . The dishes here are so awful.

a . worst b. worse c. word d. world

7 Jane feels unhappy ..... she misses her parents and her friend .

a. although b. though c. because d. but

8 These bags are ... than those ones .

a. expensiver b. more expensive c. more expensiver d. the most expensive

9 Excuse me . I'd like to ...send... this letter to the USA .

1- a. sun b. fun c. pull d. hunt

2- a. tie b. sit c. bit d. hit

3- a. cave b. have c. slave d. behave

4- a. bull b. pull c. dull d. full

5- a. do b. go c. so d. no

6- a. hotel b. photo c. move d. pagoda

7- a. needed b. visited c. played d. planted

8- a. my b. curly c. library d. lucky