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rs did realized D. didn’ t the villagers realized A 答案 A。 這是個否定詞位移的倒裝句 ,原本的意群是 not … until … , 即People didn’ t realize how serious the pollution was until all the fish in the river died .又如: How happy the children are ____ each other again. A. see B. to see C. saw D. seen 答案 B,表明原本的意群是 B The children are happy to see each other. 只是在感嘆句中把 happy 作為被強調(diào)部分調(diào)到前面去了 。 (omission)。 即把意群中的某個部分省去 , 意義還是完整的如: I didn’ t noticed it until _____ . A. it is too B. being too late C. too late D. be too late 答案 C,表明完整的意群是 C until it was too late. 又如: You can have another two days’ leave, if / when necessary. 很明顯 if /when necessary 的完整意群是 if / when it is