Review the following sentences as required（根据所给要求，改写下列句子。每空格限填一词）：（共12分）
【小题1】Uncle Li used to go fishing in a small pond. (改为否定句)
Uncle Li didn’t use have been to go fishing in a small pond.
【小题2】The government has made some plans to improve our world. (改为被动语态)
Some plans What delicious How soon made to improve our world by the government.
【小题3】His mother cooked very delicious dishes for us. (改感叹句)
too... to how to dishes his mother cooked for us!
【小题4】 Grandma will finish the sweater in three days. (对划线部分提问)
will Grandma finish the sweater?
【小题5】The water is polluted so seriously that we can’t drink it. (保持句意不变)
The water is polluted seriously for us drink.
【小题6】 Could you tell me how I should take the medicine?（改简单句）
Could you tell me take the medicine?
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解析：
【小题1】本题为过去时，谓语动词为一般动词，用didn’t构成否定句，后跟动词原形use，故本题空格处填didn’t use。
【小题2】被动句的结构为be+动词过去分词，完成时态的被动句结构为have been+动词过去分词，故本题空格处填have been。
【小题3】本题为感叹句，修饰的中心词为名词dishes，故用what修饰名词，名词前加修饰的形容词delicate，故本题空格处填What delicious。
【小题4】对时间长度以后提问用疑问短语多久以后How soon。
【小题5】本题的含义为水污染的太严重了而不能饮用，too……to表示太……而不能的含义，故本题空格处填too... to。
【小题6】疑问词how后跟动词不定式可代替从句，故本题空格处填how to。