Two and two (make) make four.

1/ A. went

B. where

C. never

D. get

2/ A.trip

B. did

C. with

D. nice

3/ A. Bay

B. play

C. stay

D. watch

People often put books or flowers on this.

=> Shelf

a) Viết tập hợp B các phần tử của A và số đối của chúng.

\(B=\left\{-5;-3;5;7;3;-7\right\}\)

b) Viết tập hợp C các phần tử của A và các giá trị tuyệt đối của chúng.

\(C=\left\{5;-3;7;-5;3\right\}\)

2.Hoa is going to have a picnic next Sunday.

=> What is Hoa going to have next Sunday?

1. Hoa is going to have a picnic next Sunday.

=> When is Hoa going to have a picnic?

2.Hoa is going to have a picnic next Sunday.

=> When is Hoa going to have a picnic?

3. They often watch TV in their room in the evening.

=> Where do they often watch TV in the evening?

4. I go swimming in the river in summer once or twice a week.

=> How often do you go swimming in the river in summer?

5. Nga's family is going to buy a new house next week.

=> What is Nga's family going to do next week?

6. There are many people in the room now.

=> How many people are there in the room now?

7. My sister's eyes are blue.

=> What colour are your sister's eyes?

8. Her teeth are very nice.

=> How are her teeth?

9. We sometimes have fish for luch.

=> What do you sometimes have for lunch?

10. My dictionary is two centimeters thick.

=> How thick is your dictionary ?

11. I am 30 kilos.

=> How heavy are you?

I'd like a nice juicy orange. ( JUICE)

1.Viet and his parents go back to their hometown to visit his uncle last weekend.

=> went

2. He live in a small village in Nam Dinh Province.

=> lived

3. They went to Ha Noi Railway Station with Taxi.

=> by

4. Then we took a plane to their hometown.

5. His uncle took them to Vi Xuyen Lake, Rong market and Thinh Long beach.

6. They has a wonderful time in their hometower

=> had

1. She (study) studies map in Geography.

2. He enjoys (collect) collecting stamps and coins.

3. He (visit) is going to visist Ha Long Bay tomorrow.

4. They (visit) are going to visit Da Nang this summer vacation.

5. Long is thirsty. He'd like (drink) to drink some water.

\(C=\sqrt{6+2\sqrt{30}+5}-\sqrt{6-2\sqrt{30}+5}\\ =\sqrt{\left(\sqrt{6}+\sqrt{5}\right)^2}-\sqrt{\left(\sqrt{6}-\sqrt{5}\right)^2}\\ =\sqrt{6}+\sqrt{5}-\sqrt{6}+\sqrt{5}\\ =2\sqrt{5}\)