I think I can buy придумать 5 предложений

1)I think I can buy a good present for my mum birthday! 

2 I think I can buy a dog and walk with it!

3)I think I can buy a lot of sweets for my friends!

4)I think I can buy a new book, to read new interesting story!

5)I think I can buy a ticket for a plane and fly to Paris!