Hoàn thành các câu sau bằng cách điền "enough" vào chỗ trống kèm theo các từ cho sẵn trong ngoặc.
- She is not ____ (old) to drive a car.
- This box is ____ (heavy) for me to lift.
- The room is not ____ (big) for all of us.
- He is ____ (intelligent) to solve the problem.
- The water is not ____ (clean) to drink.