Ex.1 поставьте глаголы в единственном или во множественном числе 1. the water in this lake … (to look) very clean. 2. maths … (not / to interest) me very much. 3. all of our furniture … (to be) brand new. 4. sugar … (to damage) your teeth. 5. the new they brought us … (to be) good. 6. your trousers … (not / to match) your shirt. 7. the team … (to discuss) the strategy before every game. 8. most people … (to worry) about the effect of pollution on the environment. 9. billiards … (to be) his favourite game. 10. knowledge of other languages … (to help) people in business.