Who is ________ woman in red？

She's our chemistry teacher， Miss Li（　　）

A．aB．anC．the

Every year， _________books are given away to the poor children in the countryside．（　　）

A．thousandB．thousands of

C．thousand of

We will attend the junior high graduation ceremony _________June 21st， 2019．（　　）

A．inB．atC．on

I know little about this product．

Surf the Internet， and you will get much _________about it．（　　）

A．informationB．message

C．suggestion

Our teachers and parents will be proud of us because we have grown up and can be responsible for _________（　　）

A．themselvesB．ourselvesC．yourselves