--- Be quick, ______ we’ll be late for the class.--- Ok, I’m coming.
It’s raining outside. _______ this raincoat, please.
Mr. Wang _______drive to work, but now he _______there by bike to keep healthy.
— _______ late for school again, Tim!— Sorry, I promise that I _______.
I will never forget the terrible accident _______ it happened so long ago.
It is reported that the sandstorm is moving _______ the south year after year.