Be careful ____your things when you are on the train.A. to B. with C. in
—Can I get my ears pierced, Mom? —No. As a student, you ________ do that.
I used to go to sleep ________ my bedroom light ________.
How do you learn English?_______.
The man is very rich, he has __________ airplane.
----Your pencil case is very nice. ----__________.