阅读短文，根据短文内容，从题中所给的A、B、C、D四个选项中，选出最佳答案。

 

    Mrs. Song is reading a letter from her children.

Dear Mom,

    Happy Mother's Day!

    Thank you very much for working so hard for us. You always get up at half past five every morning. At seven o'clock, you have to take the bus to work because our home is far from your school. You are always very busy and come back home late on weekdays. On weekdays you often help your students with their English at home. We know you are tired every day. But you are still patient(有耐心的) with your students.

    Today is Mother's Day. We want to do something special for you. We made this dress for you with the help of Grandmother. Hope you can like it. And Mom, for yourhealth, please don't stay up too late.

Yours,

Amy and Tommy