Rewite the following sentences

I. Rewite the following sentences.
1. Why don't we ask her for the help?
-> You had....................................................
2. Your phone is just like the one I used to own
-> I used.......................................................( similar )
3. Does overpopulation cause a lot of social problems in this area.(causes)
-> Overpopulation................................................................................?
4. If he doesn't help them some money, they will meet some toubles.
-> Unless...................................................................................
5. The failure of the team caused us great disappointment.
-> We were..................................................................