Bai Ling is two years older than Mary.Which one is right?A.Bai Ling and Mary are both 12 years old.B.Bai Ling is 10 years old and Mary is 12.C.Bai Ling is 12 years old and Mary is 10.
They take their students the park .
He often helps his classmates their English .
We do a lot interesting things science class .
What’s wrong your child ?
Don’t worry your little brother .