Bài 1:
1. we do so $\to$ so do we
2. Spend $\to$ Spending
3. have $\to$ having
4. ask $\to$ asked
5. changing $\to$ to change
Bài 2:
1. are - be crying (không chắc)
2. to rain
3. came
4. will be done
Bài 3:
1. The date of the meeting will be changed again.
2. The children enjoyed walking in the rain.
3. His car has just been stolen.
4. Peter asked me if he could borrow me some money.