---Would you like to go out for dinner with me?--______,but I have to finish my homework first.
—There is something wrong with my foot.Dad,could you please________?—No problem.
—Always look around________you cross the street,David.—OK,I know,Mom.A.untilB.beforeC.unless
She looked at me________disbelief when I told her the news.
Keep________till you see the light,then turn right.
The children decide________ their schoolyard this Friday afternoon.