根据短文内容，选择正确答案。

It’s Sunday morning．There are many people in the park，some boys  are playing basketball．There are some girls under a big tree．They’re singing and dancing．What are those women doing? They are drinking tea．Look at the woman in a blue coat．Who's she? She’s my mother．She is talking to Lin Feng．Lin Feng is her student．He is a good student．He studies hard．He’s good at all the subjects． And he's friendly to all his teachers and his friends．

小题1:The boys are _________.

A．singing

B．playing basketball

C．dancing

D．drinking小题2:My mother is _______.

A．a teacher

B．an office

C．a doctor

D．a woman小题3:Lin Feng is in__________.

A．my home

B．the classroom

C．the zoo

D．the park小题4:Who’s under a big tree?  __________

A．Some people

B．Some women

C．Some girls

D．Some boys．小题5:what color is my mother's coat? It’s _________.

A．blue

B．white

C．red

D．yellow

提单的功能有哪些