—Look! He’s running so fast!—Hard to______ his legs were once broken.A.know B.imagine C.realize D.find
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B解析试题分析：句意:--看！他跑地多快！--很难想像他的腿曾经断过。Know知道； imagine 想像； realize认识到； find找到。根据句意故选B。考点：考查动词的用法。
点评：本题难度适中。动词是高考常考的内容，需要考生平时的积累。不仅熟记它们的意义还要掌握它们的用法及区别。即学即练：They didn't ______their fault till we pointed it out to them.A. know B. imagine C. realize D. find解析：C。句意：直到我们向他们指出了他们的错误,他们才意识到。