Last Sunday,when I got to the station,II had left my ticket at home.

How do people usually ___________ in the office?

The desk _____ the teacher is _____ the classroom.[ ]

Are you ______ your son has difficulty in studying at school?

Mr. Gao, I don’t understand the meaning of this new word. —You can __________ the word in your dictionary. I believe you can understand it well.