_________ is my pencil box? A.Where B. What C. When
-Do you know Lang Lang? -Of course. He is a famous pianist and he plays the piano_______ .
"Can you _____ the lost wallet in detail?” the policeman asked.
Don't forget ______ thanks when other people help you.
I'd like you to meet Bob. is my best friend.
______ is the last month of a year,