Sorry, Mr. Green . I have____my homework at home.—-Never mind. But don’t forget______it to the school tomorrow.

There is ____ as a free dinner in this world, as the saying goes, “No pains, no gains”

students are required to take the boat race.

all know, Jack isexperienced _____ the problem of this kind.

__________ David could remember, he hadnever said an angry word to that customer.