Can you help me use the correct form of Participle,Gerund or Infinitive
1. They expected the teacher____(talk)to them.
2. By this time_____(get used) to the atmosphere of the big city,he no longer stranger.
3. We stopped_______(buy) food in the store because the owner raised the price.
4. She wants the work______(to finish)
5. They can`t help him______(do) the exercise