“做蛋糕”与“分蛋糕”是社会面临的最基本问题,既要把“蛋糕”做大,又要把“蛋糕”分好。“蛋糕”分得不合理,会影响人们把“蛋糕”做大的积极性。上述要求我们必须 ( )
—Would you like to tell me what our teacher said just now? —She said that light__________faster than sound.
—Did you telephone the manager’s office? —Yes,he__________back before 9 o’clock this morning.
You can certainly leave the classroom as soon as your homework__________.
—Do you smoke? —No,I don’t.It’s two years since I __________.
—How is the boy? —Sorry.He__________though the doctor made every effort to save him.