1. Her earnings are very low.
2. Athletics is very challenging.
3. Billiards is played by many people.
4. Six months is a long time to spend in hospital.
5. American Airlines is one of the largest carriers in the United States.
6. Is the number of students studying French failing?
7. Five pounds is quite a lot of money to lose.
8. Two-thirds of the food produced on the farm are used to feed people in that region.