1. Have you met

2. did

3. are you going

4. Do you watch

5. have you lived

6. Did you have

7. did she wear

8. do 

9. What have you done

10. Have you gone

\(=\left(\dfrac{\sqrt{x}\left(\sqrt{x}+3\right)}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-3\right)}-\dfrac{4}{\sqrt{x}\left(\sqrt{x}-3\right)}\right).\left(\dfrac{\sqrt{x}+2+\sqrt{x}-2}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\right)\)

\(=\dfrac{x-4}{\sqrt{x}\left(\sqrt{x}+3\right)}.\left(\dfrac{2\sqrt{x}}{x-4}\right)=\dfrac{2}{\sqrt{x}+3}\)

\(B=\dfrac{\sqrt{x-3-2\sqrt{x-3}+1}}{\sqrt{x-3}-1}=\dfrac{\sqrt{\left(\sqrt{x-3}-1\right)^2}}{\sqrt{x-3}-1}=\dfrac{\sqrt{x-3}-1}{\sqrt{x-3}-1}=1\)

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lỗi rồi

How do you come to school?

Are you good at spelling?

Can you play the guitar?

How often do you have homework?

Who do you sit next to? 

How old is your grandma?

Which book do you like?

2 how do you come to school

3 are you good at spelling

4 can you play the guitar

5 how often do you have homework

6 who do you sit next to

7 how old is your granma

8 which book do you like

1 support

2 encourage

3 aid

4 assisted

5 help

6 save

7 rescued

8 guarded

9 defend

10 controls

11 manage

12 check