1.A.The poor old man made his living by collecting rubbish.B.The poor old man ________ by collecting rubbish.2.A.This is an agreement that will be greatly beneficial to both parties.B.This is an agreement which will be ________ to both parties.3.A.Many patients can get the benefit of the new treatment in the hospital.B.Many patients can ________ the new treatment in the hospital.4.A.Why don’t you go there right now?B.Why ________5.A.He worked as a spy for his government for ten years.B.He ________ for his government for ten years.6.A.If you don’t goI shall not go.B.If you don’t go________ I.7.A.He has two sonsand both of them look like him.(变全部否定句)B.He has two sonsand ________ of them ________ like him.