(2014·兖州模拟)—Why do you look so worried?—My computer broke down last week and my essay has been left________since.

The boy _______to his mother that he had _______ thetable for supper and then ____ down to have a rest.

Marx looks nervous.—-So __________ you if you had so fierce acompetition.

It _____ sunny today, but it _____ cloudyyesterday.

Must I do the work today? —No, you _______. You may do it tomorrow.