( )19.I’m a little hungry. Pass _________ a piece of bread, please.
A. I B. me C. my D. mine
( )20.The movie will start _________7:00 o’clock. Let’s hurry.
A. on B. in C. at D. for
( )21.-__________ shall we have our class meeting?
-Next Monday.
A. Why B. Where C. When D. What