29.doing volunteer work/his free time/at a local orphanage/spends/He often
=>He often spends his free time doing volunteer work at a local orphanage
30.when we were young/and eat candy/soft drinks/We used to drink
=>We used to drink soft drinks and eat candy when we were young
31.warm enough/to go swimming/The weather/is not/for us
=>The weather is not warm enough for us to go swimming
32.lot of exhibitions/Bell/at a/demonstrated /his invention
=>Bell demonstrated his invention at a lot of exhibitions

okay :')

một số câu mik giải đúng nhưng chx có GP á. :<

hihi. giống mik :>

\(\dfrac{x-1}{x+5}=\dfrac{6}{7}\)

đk: x < -5 

\(\Rightarrow\left(x+5\right).6=\left(x-1\right).7\)

\(\Rightarrow6x+30=7x-7\)

\(\Rightarrow6x-7x=-7-30\)

\(\Rightarrow-x=-37\)

\(\Rightarrow x=37\)

( thỏa mãn)

1.This book is very intresting.

How interesting this book is!

2.She is an intelligent girl.

How intelligent girl she is !

3.That student is excellent.

How execllent  that student is !

4.This is a very comfortable room.

How comfortable this room is!

5.These are modern computers.

How modern these computers are!

6.This cake is very delicious.

How delicious this cake is!

7.That bicycle is old.

How old that bicycle is!

8.The weather is very wet.

What wet weather!

9.The houses are beautiful.

What beautiful houses are!

10.The boy is very clever.

What a clever boy!

11.The pictures are very colorful.

What  colorful pictures are!

12.There are intelligent boys.

What intelligent boys are!

rừng rậm và xavan nha

1. party

2. go

3. enjoyed

4. join

5. watched

6. went/ went /enjoyed

7. ate

8. ate/ played

9. come

10. 

11. festival

12. go/ countryside

13. on/ beach

14. at

15. in

    3.( 2x - 3) + 2(2 - x) = -3

⇒ 6x - 9 + 4 - 2x = -3

⇒ 4x - 5 = -3

⇒ 4x = 2

⇒ x = \(\dfrac{1}{2}\)