When I was a student, I ______ to school ______ the bus
Work hard, ________ you’ll fail in the English exam this time.
I’m tired now. Let’s stop ________.
A :Is there _______ in today’s newspaper? B: Sorry, nothing.
A: Is the shirt made ______ cotton? B: Yes. It’s made _____ China.
There are over ______ books of all kinds in the library.