Cho M=\(\frac{2}{1+\sqrt{a}}\)

Tìm số tự nhiên a để 18M là số chính phương

II. Give the correct form of each verb in bracket by using superlative form.

1. My Tam is one of (popular) ……………………. singers in my country.

2. Which planet is (close) ……………………. to the Sun?

3. Who is …….. (tall) person in your family?

4. My mum is ……… (good) cook in the world.

5. December is …….. (cold) month of the year in my country.

6. What’s ………. (dangerous) animal in the world?

7. Ethan is ……… (happy) boy that I know.

8. Where are ………… (nice) beaches in your country?

9. She bought ………. (big) cake in the shop.

10. Who is ………… (famous) singer in your country?