| A.a cure for colds |
| B.bottles |
| C.a cure for old age |
| D.a medicine that made people live forever |
| A.the medicine was too cheap |
| B.the medicine was too expensive |
| C.he looked quite old himself |
| D.he didn’t look honest |
| A.变化 | B.付钱 |
| C.给……钱 | D.向……要价 |
| A.one dollar a bottle |
| B.twenty-five dollars a bottle |
| C.ten dollars a bottle |
| D.fifty dollars a bottle |
| A.The cure for old age is very useful and not so expensive. |
| B.he man is not honest, and neither is his assistant. |
| C.The cheaper the medicine is, the more people will buy. |
| D.The two men are very honest, and they’d like to help people live forever. |