下列每句话中都有一处错误,请找出并改正。
1. September 10th is Teacher's Day.
A B C D
2. They are going to buy a bicycle at Sunday.
A B C D
3. The little boy work hard at school.
A B C D
4. How old is your friend? He's twelve year old.
A B C D
5. Rose has supper and her family.
A B C D