The book was written in 1946， the education system has witnessed great changes.

He is good at ________ himself _______ new things, which makes me admired.

I didn’t go to work today. —-You _____; it’s Sunday today.

I’m sorry you’ve missed the train. It tenminutes ago.

I don’t know ______ with this problem.It’s too hard. —Youcan ask Mr Wang for help.