1B

2 C

3 B

4 C

5 D

III

1 A

2 D

3 C

4 C

5 C

6 B

7 A

8 B

9 D

10 A

11 C

12 C

13 B

14 C

15 D

16 C

17 C

18 A

19 D

20 B

21 D

22 D

23 A

24 A

1. There's the lady whose dog was killed.

2. That's the man who is going to buy the company.

3. He's the person whose car was stolen.

4. She's the new doctor who is coming to the hospital next week.

5. She's the journalist whose article was on the front page of The Times.

6. They're the people whose shop burned down last week.

7. That's the boy who has just got a place at university.

The next picture:

1. This is the man whom I met in Paris.

2. I wanted the painting that you bought.

3. This is the chair that my parents gave to me.

4. She is the woman who telephoned the police.

5. He's the person who wanted to buy your house.

6. We threw out the computer which never worked properly.

7. This is the lion who has been ill recently.

8. The man who was driving the car was badly injured.

9. The children who live in the next street broke the window. 

10. That's the woman whom I was telling you about.

PTHH: \(Na+H_2O\rightarrow NaOH+\dfrac{1}{2}H_2\uparrow\)  (1)

            \(Al+NaOH+H_2O\rightarrow NaAlO_2+\dfrac{3}{2}H_2\uparrow\)  (2)

Ta có: \(n_{H_2\left(1\right)}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

\(\Rightarrow n_{Na}=0,8mol\) \(\Rightarrow m_{Na}=0,8\cdot23=18,4\left(g\right)\)

Mặt khác: \(n_{H_2\left(2\right)}=\dfrac{15,68}{22,4}=0,7\left(mol\right)\)

\(\Rightarrow n_{Al}=\left(0,7-0,4\right)\cdot\dfrac{2}{3}=0,2\left(mol\right)\) 

(Vì Na là kim loại rất mạnh nên cũng sẽ tác dụng với nước trong dd NaOH dư và giải phóng khí H₂ nên phải trừ số mol của H₂ của Na)

\(\Rightarrow m_{Al}=0,2\cdot27=5,4\left(g\right)\)

\(\Rightarrow m=5,4+18,4=23,8\left(g\right)\)

đâu ?

I 1D 2C 3B 4A 5D 6B 7D 8A 9C 10C

III 1D 2C 3A 4B 5A 6C 7B 8B 9C 10C 11A 12B 13C 14A 15A 16B 17A 18D 19B 20C 21C

V  1C 2D 3B 4D 5C 6B 7C 8D 9A 10A

VII

playing

repairing

learning

having

to do

to choose

listening

playing

to read

chatting

VIII

I wish I weren't bisy 

She wish she had a bike

We used to play soccer in the afternoon

three hundred people are invited to the wedding by mary and Tom

I haven't seen her for 10 months

We wish we could go out

I wish she went to my bỉthday party

We used to go camping together

Two millions book are sent to .....

We haven't met each other for five years