I. Give the correct form of the word given to complete the sentences.

1. A trip to Fan Si Pan is an unforgettable experience.

2. You can watch traditional when you visit Sa Pa.

II. Read the sentences correctly, paying attention to the words having sound /t/ and /st/.

1. Look! It's almost eight and we still must wait!

2. I'm against going along the coast by boat.

3. Cutting down rain forest is against the law.

4. Top chopstick shops stock top chopsticks.

5. Mount Everest is the highest mountain in the world.

Are there any trees and flowers?

=> Yes, there are.

49

tính tổng rùi tìm ssh, chia ra là xong

1. In most countries, there are organizations especially for teenagers.

2. There are many kinds of entertainment for young people.

3. A reusable shopping bag is made of natural materials.

4. These shoes are smart but they are comfortable.

5. Game show can be both entertaining and educational.

1 )The weather is fine enough for them to have a picnic in the coountryside .

2) It's very easy for Huy to make friends at school because he is very sociable.

1. He (do) his homework after school.

\(=>\)He had done his homework after school.

2. They ( watch) TV after school.

\(=>\) They had watched TV after school.

3. Nam (do) the housework.

\(=>\)Nam does the housework.

4. The father (play) soccer every evening.

\(=>\)The father plays soccer every evening.

81⁷ - 27⁹ - 9¹³=(3⁴)⁷-(3³)⁹-(3²)¹³=3²⁸-3²⁷-3²⁶=3²².3⁶-3²².3⁵-3²².3⁴=3²².(3⁶-3⁵-3⁴)=3²².(729-243-81)=3²².405

=>( 81⁷ - 27⁹ - 9¹³ ) chia hết cho 405

a)5.4²-18:3²=5.16-18:9=80-2=78

b)3³.18-3².12=3²(18-12)=3².6=54

c)39.213+87.39=39(213+87)=39.300=11700

d)80-[130-(12-4²)=80-(130+4)=80-134=-54