10. Исправь ошибки — зачеркни лишнее слово. 1. Excuse me, where's is the hospital? 2. It's quarter past eleven o'clock. 3. I am don't have to go to school on Saturday. 4. He has violin lessons twice times a week.

Решение:

Исправляем ошибки в предложениях, зачеркивая лишние слова.

1. Excuse me, where's the hospital? (Лишнее 'is' после 'where's').
2. It's quarter past eleven o'clock. (Предложение составлено верно).
3. I don't have to go to school on Saturday. (Убираем 'am', так как 'don't have to' уже выражает необходимость).
4. He has violin lessons twice a week. (Убираем 'times' после 'twice', так как 'twice a week' означает дважды в неделю).

Ответ: 1. Excuse me, where's the hospital? 2. It's quarter past eleven o'clock. 3. I don't have to go to school on Saturday. 4. He has violin lessons twice a week.