Помогите пожалуйста, очень надо, максимально срочно!!!

Раскройте скобки:
1) I am sure we (to solve) this problem one day.
2) By Sunday they (to finish) the project at last.
3) While she (to play) the piano her sister (to sing).
4) He (to get) a letter yesterday.
5) Tom (to meet) his friend when he (to return) home.
6) Last year we (to take) part in the contest.
7) At 3 clock tomorrow we (to play) football.
8) Ann (to get) up, (to make) coffee and (to go) to work.
9) It (to rain) for 2 hours. It seems that rain (not, to stop).
10) I usually (to have) porridge for breakfast, but today I (to eat) sandwiches.