Use the derivatives of the words on the right to complete the sentences
1. I don't think I can afford to buy such an___ mobile
2. Your___ mind will help us to find the way out.
3. Young Ralph is a very___ person
4. This is a very ___task. Why not try!
5. My parents don't think this is a____ decision
EXPENSE
INVENT
TOUCH
CHALLENGE
REASON