根据短文内容，从题中所给的 A、B、C、D四个选项中，选出最佳选项。

David is an English boy. He is twelve years old. His eyes are blue. Zhang Li is a tall boy. He is eleven. His eyes are black. They are good friends. David's hair is yellow and Zhang Li's hair is black. Zhang Li's dad is a Chinese teacher. David's dad is an English teacher. He is in the same school with Zhang Li's dad. David's mom is an English teacher, too. David and his mom look different. He looks like his dad. David's family are new in China. Zhang Li's dad and mom often （经常） help them. They like their new friends.