c d d d d

Tất cả những câu mình viết bạn chỉ cần thêm in spite of hoặc despite vào đầu câu nhé (tự chọn)

1 the wide river, we can swim across it

2 the high celling, they can reach it

3 being very poor, Ba continued to go to school

4 being short, Tuan couldn't asleep in this sleeping bag

5 being careful, the children broke the vase

6 being tall, Nam can't play volleyball

7 being ill, my mother must go to work

8 being tired, Hanh went to school

9 his friendliness, I don't love him

10 being sick, she went to bed late

11 being careful, Phong always gets bad marks

12  being rich, my father is always economical

13 Miss Linh's beauty,my brother doesn't like her

14 being old, my grandmother can lift that box

15 their difficulty, we can do these exercise

16 this table's lightness, hoa can't lift it

17 this yarrd's hugeness, we don't want to play in it

18 the river's danger, we often swim in it

19 being young, I often drive a car

20 the yard's smallness, we can play soccer in it happily

11B và D

12A

13C

14D

15A

4 If you aren't alert, you computer will be infected with viruses

5 If we use much pesticide on vegetables, they will become poisonous

9 Because Nam needs to improve his social skills, he attends the activity

11 How about using public buses instead of motorbike 

12 They enjoy protecting the environment unpolluted 

15 Mr Brown was disappointed that his son didn't write to him

11 D

12 B

13 C

14 D

15 C

16 B

Bài 10: A

Bài 11:

Áp dụng hệ thức về cạnh và góc trong tam giác vào tam giác vuông, ta được:
AC = AB.tan\(^{50^0}\) = 21.tan\(^{50^0}\) \(\approx\) 25

BC = \(\dfrac{AB}{\sin C}\)= \(\dfrac{21}{sin40^0}\)\(\approx\)33

BD = \(\dfrac{AB}{\cos25^0}\)=\(\dfrac{21}{\cos25^0}\)\(\approx\)23

1D 2B 3C 4A 5A 6C 7A 8A 9B 10A 11C 12D 13D 14D 15A 16D 17A 18C 19C 20D 21D 22C 23C 24A 25B 26C 27D 28B 29C

5 Europe export bananas 

6 Oil has been discovered at the North Pole

7 All our money and passports were stolen

8 They are building a new hospital in my neighborhood

9 Where is English spoken?

10 Fortunately the accidents didn't damage the machinery

11 People say that apples are good for our health

12 What have they done to help the poor in this city

13 The student are writing the lessons now

14 Red is believed to be the symbol of luck

15 My sister has had someone make a new dress recently 

\(Al(OH)_3 + 3HCl \to AlCl_3 + 3H_2O\\ Ba(OH)_2 + 2HCl \to BaCl_2 + 2H_2O\\ Na_2CO_3 + 2HCl \to 2NaCl + CO_2 + H_2O\\ Fe_2O_3 + 6HCl \to 2FeCl_3 + 3H_2O\\ Al_2O_3 + 6HCl \to 2AlCl_3 + 3H_2O\\ 2Al(OH)_3 + 3H_2SO_4 \to Al_2(SO_4)_3 + 3H_2O\\ Ba(OH)_2 + H_2SO_4 \to BaSO_4 + 2H_2O\\ Na_2CO_3 + H_2SO_4 \to Na_2SO_4 + CO_2 + H_2O\\ Fe_2O_3 + 3H_2SO_4 \to Fe_2(SO_4)_3 + 3H_2O\\ Al_2O_3 + 3H_2SO_4 \to Al_2(SO_3)_3 + 3H_2O\)

Al(OH)₃+ 3HCl->AlCl₃+3H₂O

2Al(OH)₃+3H₂SO₄->Al₂(SO₄)₃+6H₂O

Fe₂O₃+6HCl->3FeCl₂+2H₂O

Fe₂O₃+3H₂SO₄->FeSO₄+3H₂O

Al₂O₃+6HCl->2AlCl₃+3H₂O

Al₂O₃+3H₂SO₄->Al₂(SO₄)₃+3H₂O