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.

1. looks2.doesn't interest3. is4. damages5. (вы пропустили существительное, число глагола определить невозможно)6. don't match 7.discusses8.worry9. is10. helps