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1 was arrested before the garden by the boy yesterday
2 his cats taken care of carefully by Jack everyday
3 Has the country been protected from Covid-19 successfully
4 is reported that the man is running out of money
is reported to be running out of money\
5 has been said that the thief got out of the prison
has been said to have got out of the prison
6 was thought that Mary had turned down the job
Mary was thought to have turned down the job
1.get up
2.set off
3.live on
4.deal with
5.closed down
6.come back
7.turned it down
8,look through
1. I talk less comfortably than Tom.
I don't talk as comfortably as Tom.
I don't talk so comfortably as Tom.
3. She plays tennis better than we (do).
She doesn't play tennis as badly as we (do).
4. I suggest preserving this tradition.
I suggest that we should preserve this tradition
How about preserving this tradition.
5. Jack wondered whether or not he should make friends with that man then.
6. Due to the wonderful trip, we didn't want to finish.
Câu 1.
Dùng dung dịch axit clohidric \(HCl\) vào hai chất trên:
+Thấy xuất hiện khí bay ra: kali cacbonat \(K_2CO_3\)
\(K_2CO_3+2HCl\rightarrow2KCl+H_2O+CO_2\uparrow\)
+Không hiện tượng: kali sunfat \(K_2SO_4\)
Câu 2.
a)\(Na_2O+H_2O\rightarrow2NaOH\)
b)\(Na_2O+H_2O\rightarrow2NaOH\)
\(6NaOH+Fe_2\left(SO_4\right)_3\rightarrow2Fe\left(OH\right)_3+3Na_2SO_4\)
Câu 3.
\(n_{NaOH}=\dfrac{20}{40}=0,5mol\)
\(n_{HNO_3}=\dfrac{20}{63}\approx0,3mol\)
\(NaOH+HNO_3\rightarrow NaNO_3+H_2O\)
0,5 0,3
\(\Rightarrow NaOHdư\) \(\Rightarrow\)Qùy hóa xanh.
1 is grown in many countries in the world
2 was invented by Graham bell many years ago
3 has been used for many years
4 Is English practiced by Lan everyday
5 will be taken out of the city
6 can this letter be sent by Mary 2 days ago
7 is being made from vegetables
8 must be finished before Sunday
9 hadn't been used for a long time
10 Will I be met at the airport by Jack tomorrow
12 It is thought that Maradona is.....
13 It has been believed that the job is.....
14 It was explained that this powerful.....
1 My parents go shopping twice a week
2 Hoa's house has a balcony
3 My brother usually plays badminton with his friends
4 My favorite book is Tam and Cam. What is yours?
5 There are 10 pencil cases on the table
1, My parents go shopping twice a week.
2, Hoa's house has a balcony.
3, My brother usually plays badminton with his friends.
4, My favorite book is Tam and Cam. What's yours?
5, There are ten pencil cases on the table.