6. 

=>Although he is concerned about the children’s safety, nothing was done to free them.

7.

=>In spite of being tired, I couldn’t sleep.

8 Although he’s got a German name, he is in fact French.

=>Despite having a German name, he is in fact French.

9. 

  =>Despite the low salary, I decided to accept the job.

10.

  =>We lost the match, though we were the better team                                                                                      

11. 

 =>She managed to walk to the village though her feet were injured. 

1. Kim loại + phi kim: Cu + Cl22. Kim loại + axit3. Kim loại + oxit axit4. Kim loại + muối5. Kim loại lưỡng tính+ bazo: Al + NaOH6. Oxit bazo+ oxit axit: CaO+ CO27. Oxit lưỡng tính+ bazo8. Bazo+ axit9. Hidroxit lưỡng tính+ bazo10. Bazo+ muối11. Bazo+ oxit axit12. Bazo + phi kim13. Oxit axit + muối: SiO2+ Na2CO3=> Na2SiO3+ CO214. Phi kim + muối : Cl2+ FeCl315. Muối+ muối16. Muối + axit17. Nhiệt phân muối

1  If I were you, I would plant many vegetables in the garden

2 More tourists will come here if the beach is cleaner

3 What would happen if there were no cars in the world?

Khối lượng của vật là:  (tạ)  (kg)

Trọng lượng của vật là:  (N)

Khi dùng mặt phẳng nghiêng có chiều dài 8 m để đưa vật lên cao 2 m, ta bị thiệt 4 lần về đường đi, do đó lợi 4 lần về lực.

Lực cần tác dụng lên vật là:

 (N)

a) Lực kéo của vật B:

F = P = 50000N

b) Lực kéo của vật lên khi dùng ròng rọng động: 

F = 

Công nâng vật lên bằng ròng rọc động:

A = F.s = 25000.20 = 500000J

-9+2x=o

=>2x=0+9

=>2x=9

=>x=9:2

=>x-4,5

Vậy x=4,5

CT : A₂O_n 

%O = 16n/(2A + 16n) * 100% = 25.8 

=> 16n = 0.258(2A + 16n) 

=> 16n = 0.516A + 4.128n 

=> 0.516A = 11.872n 

=> M = 23n 

BL : 

n = 1 => M = 23 

CT : Na2O 

4.  Viết câu so sánh hơn, dùng những từ gợi ý

○     My current job/ demanding/last one.

My current job is more demanding than the last one

○     Today/ Jane/ beautiful/ usual.

Today Jane is more beautiful than usual

○     Yesterday/it/ cold/ today

Yesterday it was colder than today

○     Fruits and vegetables/ healthy/ fast food.

Fruits and vegetables are healthier than fast food

○     Life in the countryside/peaceful/life in the city

Life in the countryside is more peaceful than life in the city

○     Your sister/ good /you/ think.

Your sister is better than you think

○     Who/intelligent/ you/in your class?

Who is more intelligent than you in your class?

○     Be/Ann/short/ you?

Is Ann shorter than you?

1.        Chọn đáp án đúng

○      ..................do you go to the gym? I never go to the gym.

A. How               B. How often            C. How long

○      ..................did you get to work yesterday? I took a taxi because my car was broken.

A. How               B. Why                     C. When

○      ..................were you late for work yesterday? Because of the traffic jam.

A. How               B. Why                     C. When

○      ...............……...will you travel to this summer? I haven't decided yet.

A. Where            B. What                    C. Who

○      ..................did you sell yesterday? Bread and cupcakes.

A. What              B. Who                     C. Which