Did you go to school yesterday?— Yes, I did. But I was late. When I got to school, Mr. Zhang __________his lessons.

Excuse me, could you tell me __________?—In ten minutes.

What do you think of this book?— Good indeed. It ________ many problems we have in our study.

Playing with _______ robot is _______ unusual experience for me.

__________is the train station from this shopping mall, do you know?—- About 30 minutes by bus.