改错:从下面的句子中找出错误并改正。
1. What is your mother? She's fine, thank you. ( )___________
A B C D
2. You are a teacher, right? Yes, I'm. ( )___________
A B C D
3. What is this? It is desk. ( )___________
A B C D
4. Look! Spotty is under chair. It is eating. ( )___________
A B C D