The room is in a terrible mess; it        have been cleaned.

—Do you think the rain will affect the football match?—The players are used to such rainy weather, so it ______ make any difference to them.

—Why does Mary look so worried today?—I’m not sure, but she _____ a small accident driving here.

—I want someone to write the composition for me. —No！As a student，you _______depend on yourself.

There’s enough time for you to go to the airport. You        hurry now.