1 english

2 librarian

3 twentieth

4 energetic

5 interest/interesting

6 best

teaches -> taught

by -> on

cycling -> cycled

tree -> trees

1 when

3 with

4 the better

5 time

6 sports

7 be

9 are

10 how

1 your best

2 we go shopping this weekend

3 well

4 dont have to wear uniforms on wednesday

5 a good english teacher

6 makes she feel comfortable

7 as cheap as yours

8 our whole day to looking foe these old pictures

9 from the time you bought the computer to now

10 far from your hometown to your school

1 its got -> there are

2 bad -> bed

3 is -> has

4 he will arrive -> he has arrived

ko really sure nha bn

A : Hi! Long time no see you.

B : Oh! Is that you ? You look so different from before.

C : Yeah! I think so !

B : So where do you live now ?

A : Well, I have moved house to another place. It's near the park in the center.

D : Wow! It very far from here. How does it like ?

A : My neihgborhood is large enough for the transports passing. The people also can walk near that.

B : It's very convinient, right ? What else?

A : The view in here is beautiful, too. I can contemplate it from the window of my house. There is green trees, nice flower gardens, blue lakes and cute pets.

D : Awesome! I'm so jealous with you ! How about the people here ?

A : Oh yeah ! I forget it ! The people are kind and friendly. They help me a lot of things at the first time I have lived there.

C : I think you are the luckies guy I have known.

A : Thanks.

Chúc bạn may mắn !

Ta có: \(\frac{a^2+b^2}{c^2+d^2}=\frac{ab}{cd}\Rightarrow\frac{a^2+b^2}{ab}=\frac{c^2+d^2}{cd}\)

=> \(\frac{a^2}{ab}+\frac{b^2}{ab}=\frac{c^2}{cd}+\frac{d^2}{cd}\)

=> \(\frac{a}{b}+\frac{b}{a}=\frac{c}{d}+\frac{d}{c}\)

 Mình chỉ làm được tới khúc này