2. are sent

3. are dried

4. is covered

5. are made

6. is usually added

7. is often eaten

\(B=\left(\dfrac{1}{\sqrt{x}}+\dfrac{1}{3-\sqrt{x}}\right):\dfrac{1}{3-\sqrt{x}}\)

\(=\left(\dfrac{3-\sqrt{x}}{\sqrt{x}\left(3-\sqrt{x}\right)}+\dfrac{\sqrt{x}}{\sqrt{x}\left(3-\sqrt{x}\right)}\right).\left(3-\sqrt{x}\right)\)

\(=\dfrac{3-\sqrt{x}+\sqrt{x}}{\sqrt{x}\left(3-\sqrt{x}\right)}.\left(3-\sqrt{x}\right)\)

\(=\dfrac{3}{\sqrt{x}}\)

some => any

- some thường dùng trong câu khẳng định

- any thường dùng trong câu phủ định và nghi vấn

igloo (n): lều tuyết

1. your - you - it - mine - me - him

2. They - their - her 

3. it - his - his

4. you - my - yours - I - you - me

5. Whose - his - hers

6. recycle plastic bags

7. plant more trees

8. clean the river up

9. run a marathon

10. raise money

1. C

2. A

3. C

B

- Các câu còn lại sao cấu trúc:

A: How about + Ving

C: Let's + V

D: Shall we + V

- Tất cả các câu có nghĩa chung là diễn tả lời mời