John is a lazy student,one of_________ bad study habits is to leave for tomorrow_____ ought to be done today.
--Is Jack still in hospital? --Yes. He _________ the bad food.
_________ her son outside the school gate, she drove straight to her work place.
The ship will go faster if we sail _________ the wind.
The president is planning to increase the number of the students _________ to the university next year.
--Is your dad at home? --No, he_________ out.