Giúp em giải bài này ạ! 

Finish the second sentence so that it has a similar meaning to the first one, beginning each new one with the given word(s).

Question 1. We started learning English when we were in grade 3.

We have ………………………………………………………………………………………………….

Question 2. Ba doesn’t learn hard so his marks at school are always bad.

If ………………………………………………………………………………………………….

Question 3. “ Please, come to see us whenever you have free time, Mary.”. Daisy said.

Daisy invited ………………………………………………………………………………………………….

Question 4. The children are listening to music in their room.

Music …………………………………………………………………………………………………….

Question 5. I have read this book twice because it is very interesting.

This book …………………………………………………………………………………………………….

Question 6. Minh won’t pass the final exam if he doesn’t learn harder.

Unless ………………………………………………………………………………………………….

Question 7. Scientists have reported that there is far too much pollution nowadays in city areas.

It …………………………………………………………………………………………………….

Question 8. My sister likes reading books better than watching T.V in her free time.

My sister ………………………………………………………………………………………………….

Question 9. My mother sometimes wants to come back to her childhood.

My mother sometimes wishes she ..…………………………………………………………

Question 10. If we don’t learn harder, exam we will not pass the final.

Unless ………………………………………………………………………………………………….

Question 11. Every student must obey the school regulations.

The school regulations …………………………………………………………………………………………

Question 12. There were many lakes in our village, but now there are only a few.

Our village used ………………………………………………………………………………………………….

Question 13. “ If I were you, I would buy this English dictionary.”, Daisy said to Mary.

Daisy advised ……………………………………………………………………………………………………

Question 14. Ba is the tallest boy in his class.

Nobody ………………………………………………………………………………………………….

Question 15. We started to live in this house in 2001.

We …………………………………………………………………………………………………….

Question 16. Nam couldn’t go to school yesterday because he was ill.

If you ………………………………………………………………………………………………….

Question 17. What a pity! I didn’t have enough money to buy that interesting book.

I wish …………………………………………………………………………………………………….

Question 18. We have learnt English for six years.

English …………………………………………………………………………………………………….

Question 19. In the past, people often made banh chung for Tet themselves.

In the past ………………………………………………………………………………………………….

Question 20. It was happy for us to attend the English club last night.

We …………………………………………………………………………………………………….

Question 21. People who do morning exercises regularly often stay fit and healthy.

If you …………………………………………………………………………………………………….

Question 22. “ Where did you go last Sunday, Mary?”, Daisy asked.

Daisy asked Mary ……………………………………………………………………………………………

Question 23. We must finish this task right now.

This task …………………………………………………………………………………………………….

Question 24. In the past, people didn’t travel on holiday.

In the past ………………………………………………………………………………………………….

Combine two sentences into a new one, using the words in brackets. Do not change the given words in any way.

Question 1. This book is so interesting that I have read it twice. ( such )

………………………………………………………………………………………………….

Question 2. I’ll give you a call immediately after I have finished my work. ( as soon as )

………………………………………………………………………………………………….

Question 3. The villagers are trying to learn English. They can communicate with foreign customers. ( order )

………………………………………………………………………………………………….

Question 4. The children are eager to visit Hue next week. ( forward )

………………………………………………………………………………………………….

Question 5. My brother has been working as an artisan in a craft village for 2 years. ( ago )

………………………………………………………………………………………………….

Question 6. The girl is very friendly. She came to our class meeting last week. ( who )

………………………………………………………………………………………………….

Question 7. The cost of living has been increasing considerably in the past few months. ( up )

………………………………………………………………………………………………….

Question 8. The prospect of moving to a new flat made me much happier. ( cheered )

………………………………………………………………………………………………….

Question 9. The girl is very friendly. We met her at the meeting last week. ( whom )

………………………………………………………………………………………………….

Question 10. Those children are from poor families. They are trying to learn and work hard. ( Despite )

………………………………………………………………………………………………….

Question 11. This book is very interesting. I have read it twice. ( so )

………………………………………………………………………………………………….

Question 12. Tom got into his car and drove away. I saw this. ( get )

………………………………………………………………………………………………….

Question 13. We should reduce the amount of garbage. We can help to protect the environment. ( so that )

………………………………………………………………………………………………….

Question 14. This morning it rained very hard. We all came to school on time. ( although )

………………………………………………………………………………………………….

Question 15. The bird covered the nest with her wings. She wanted to protect her eggs. ( in order to )

………………………………………………………………………………………………….

Question 16. I was very surprised at the news. She didn’t pass the exam ( passing )

………………………………………………………………………………………………….

Question 17. We finished all our homework. We played some games of chess. ( before )

………………………………………………………………………………………………….

Question 18. Peter has lived in Viet Nam for only a month. He knows how to use chopsticks when eating.

( although )

………………………………………………………………………………………………….

Question 19. My sister practises playing the piano every day. She wants to become a famous pianist.

( in order to )

………………………………………………………………………………………………….

Question 20. It is cheap to go by train. It is expensive to go by air. ( cheaper )

………………………………………………………………………………………………….

Question 21. The tree has lovely flowers. It stands near the gate of my house ( which )

………………………………………………………………………………………………….

Question 22. They live in a big house. They only use the ground floor. ( despite )

………………………………………………………………………………………………….

Question 23. The craft village must also meet environmental requirements. It wants to develop craft village tourism. ( so that )

………………………………………………………………………………………………….

Question 24. Hoa is 10 years old. Her elder sister is 15 years old. ( older )

giúp mình bài này với !

Đặt a=3√16x-24; b=3√1-3x; c=3√19x-25
Ta có: b³ +c³=1-3x+19x-25=a³
Ta lại có: a=b+c
=>a³=b³ +c³+3bc(b+c)
0=3bc(b+c)
0=bc(b+c)
=> b=0 hoặc c=0 hoặc b+c=0sau đó tính tiếp :v