----- you swim? ----- Yes,I can.
—How long may I _____ the English workbook?—For two weeks.
There is a policeman _____ the bus. He is watching the traffic.
It’s good _____ old people to cross the road.
—Lily, here are your pens. Please _____ . —OK, Mom.
— _____ do you _____ English?—I like it very much.