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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)
\(\Rightarrow m_{Al}=0,2\cdot27=5,4\left(g\right)\)
\(\Rightarrow m=5,4+18,4=23,8\left(g\right)\)
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
1 He told me he had something to show me then
2 She said se was leaving there for Hue the next day
3 Tom told her he would come with her as soon as he was ready
4 The father told us he had to go then
5 she asked me why I came there late
6 peter asked me who put the salt in his cup of coffee
7 He asked the girl if she could play the piano
8 Maryam said that she was having a good time there
9 Hoa asked Maryam is she liked pop music
10 The man asked the boy where he lived
VII
1 had bought
2 was
3 had sold
4 passed
5 could
6 would sell
7 had gone
8 hadn't done
9 was listening
10 had to
VIII
1know 2what 3subjects 4written 5many 6in 7understanding 8friendship
IX
It's high time we went home
Unless you have a jacket and tie, you can't go to this restaurant
It was such a difficult question that no one could answer it
This letter hasn't been finished yet
5 Because he isn't good at English, he can't get a job
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