Cho dung dịch B chứa các ion : 0,13 mol Mg ²⁺ ; 0,08 mol Cl ^- ; 0,02 mol Al ³⁺ và x mol SO4 ^2-

- Tìm giá trị x

- Tìm Klượng muối tan trong dung dịch B

He turned off the computer as soon as he finished using it

-> By the time......

1. My father hasn't smoked cigarettes for a month

-> The last time........

2. It's a long time since we last went to the cinema

-> The last time.......

-> We last......

3. The last time i saw Rose was three years ago

-> It has........

4. When did you start living in this house?

-> Since when is it............

1. The room was so noisy that he couldn't concentrate on the lesson

-> The room was...............

-> The room wasn't................

2. He was such a short boy that he couldn't join the basketball team

-> The boy was...............

-> The boy wasn't ..................

3. The boy ran away from the house. She saw that.

-> She noticed.................

4. He left the house early this morning. I heard it.

-> I could hear...............

5. I let my brother use my computer yesterday

-> I allowed......................

-> My brother...................

6. Tony hasn't been allowed to smoke by his mother

-> Tony's mother.......................

7. I often have my son wash my car

-> I often have my car.................

8. Peter has got his homework done by Andy

-> Peter has had Andy.....................

9. Mary had her computer fixed by the mechanic

-> Mary asked..........................

1. He was really stupid when driving the car like that

-> IT WAS.............

2. He spent two weeks preparing for the project

-> IT TOOK...........

1. Long gave me 50,000 dong. He was very generous

-> IT WAS..............

2. She finds driving the motobike very difficult

-> IT WAS.....................