请根据要求改写下列句子，每空一词。
【小题1】You’d better eat some bread now.(改为否定句)
You’d better not, any eat cost, is bread now.
【小题2】Elsa spends $30 buying books each month.(保持句意基本不变)
The how, soon of Elsa’s books old, as $30 each month.
【小题3】Kate will return to school in a week.(对划线部分提问)
didn’t, until will Kate return to school?
【小题4】Leo and David are the same age.(保持句意基本不变)
Leo is as David.
【小题5】I went to bed after I finished my homework.(保持句意基本不变)
I go to bed I finished my homework.
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解析：
【小题1】考查固定用法。You’d better后跟动词原形，否定在动词原形前加not。肯定句用some，否定句用any。故填not, any。
【小题2】考查同义词转换。Cost指花费钱，take指花费时间，而spend的主语是人。根据spends可知，用一般现在时。故填cost, is。
【小题3】in a week“一周之内”，表示的是将来，对将来提问用how soon。故填how soon。
【小题4】考查固定句型。as...as“和......一样”。根据句意可知，Leo和David一样大。故填old, as。
【小题5】考查固定句型。not...until“直到......才......”。故填didn’t, until。