_____ you have the chance to study, you’d better make full use of your time.
A poet and artist____coming to speak to us about Chinese poems and painting tomorrow.
It was after he got what he had wanted very much _______ he realized it was not important.
This year this factory has produced ________ cars as it did last year.
The famous writer our Chinese teacher often referred ________ at our school yesterday.
Please go ______ the ship quickly. There is only ten minutes left.