摘要：614] Don’t have horse too fast, it will get tired soon. [译文] 不要让马一直这样快的跑着.它很快就会累倒的. A. ran B. to run C. runs D. running [答案及简析] D. have sb./sth. doing sth.让一直做某事.或者让某物一直处于某种状态.

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