Whose attitude(态度)  towards homework is positive(积极的) ?

A．William and Mary.	B．Chris and Sarah.
C．William and Sarah.	D．Mary and Chris.

According to Mary's post, we know _______.

A．she likes homework a lot.

B．she thinks checking homework is worthless.

C．she hates students who don't do homework.

D．she hopes people can understand her hard work.

Sarah is a_______.

A．parent

B．writer

C．student

D．teacher