25 phút

1. What a pity ! You aren't here with us now.
-> i wish you were here with us now
2. The naughty boy always draw on the wall.
->i wish the naughty boys didn't draw on the wall
3. I'd like my father to give up smoking.
-> i wish my father gave up smoking
4. He doesn't help his mother with housework.
->her mother wishes he helped her with housework
6. My friends often go on a camping trip without me.
-> i wish my friends went on a camping trip with me
7. I must go now
->i wish i didn't have to go now
8. He always goes to school late
-> i wish he didn't go to school late
9. My brother is too short to play basketball.
-> my brother wishes she wasn't short to play basketball.
10. I don't have enough money to help you .
-> i wish i had enough money to help you

Các phản ứng xảy ra:

Vì dung dịch chỉ chứa một chất tan duy nhất nên chất tan đó là NaAlO2

Vậy V = 0,1.22,4 = 2,24 (lít)

IV. 

1. is raining

2. are meeting

3. are visiting/visit

4. didn't write/phoned

5. didn't visit/ caught

6.cost

7 will feel