В места пропусков вставьте "is" или "are"

1. Economics ... difficult for people with poor maths skills.
2. American Airlines ... one of the largest carriers in the United States.
3. The stairs ... too steep for me to climb.
4. Two-thirds of the food produced on the farm ... used to feed people in that region.
5. ... the number of students studying French failing?
6. Five pounds ... quite a lot of money to lose.
7. In the Philippines, there ... heavy rains each year.
8. Two hours per week ... not enough to learn a foreign language.
9. Two miles ... not a long way to walk to school.
10. Six months ... a long time to spend in hospital.
11. The press ... often unfair to political candidates.