1) Did you spend a great time in St.Petersburg?
2) She spends money like water, nothing can stop her.
3) I have spent money to buy leaflets, stamps and envelops.
4) Don`t persude him. It's waste of time.
5) I am asking you not to pour out a lot of money for kid's toys.
6) Why do you waste a lot of time talking with someone on the phone?
7) Stop buying great number of clothes, which you won't need. It's just a waste of money.