题目内容
19．You mother was really worried about you．You shouldn'thave left （leave） home without a word．分析 你妈妈真的很担心你，你本不该一句话不说就离开家的．
解答 答案：have left
根据句意以及前一句使用了一般过去时可知，此处用在情态动词shouldn't之后，表达的是过去本不应该做而（实际）却做了的事情，应使用虚拟语气；故用have left．
点评 做本题时，需要掌握情态动词在虚拟语气中的用法：如shouldn't+have+done表示过去本不应该做而（实际）却做了的事情，含有责备或遗憾的语气，意为"本不应该…"等．
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| 37．A．hand out | B．give up | C．throw away | D．concentrate on |
| 38．A．mistake | B．movement | C．mark | D．notice |
| 39．A．words | B．preparations | C．grades | D．questions |
| 40．A．clear | B．pure | C．fair | D．simple |
| 41．A．silently | B．nervously | C．happily | D．bravely |
| 42．A．left | B．reached | C．passed | D．followed |
| 43．A．notebook | B．textbook | C．dictionary | D．paper |
| 44．A．sorry | B．angry | C．glad | D．lucky |
| 45．A．match | B．case | C．speech | D．operation |
| 46．A．learning | B．cheating | C．relaxing | D．calling |
| 47．A．love | B．join | C．forgive | D．recognize |