Find sentences with mistakes

Варианты ответов и условие задания

1. My mother is an doctor.
2. I have an great idea.
3. It is a good horse that never stumbles.
4. The is an house in New Orleans.
5. It is an interesting book.
6. There is a eraser in my pencil case.
7. Does anybody have a pen?
8. You can take an horse to the water but you cannot make it drink.
9. Bill doesn't have an dog.
10. An apple a day keeps the doctor away.