He hurried to the house and was disappointed when he found that it was empty.把 and was disappointed when he found that it was empty改成不定式子.为什么不可以改成 was disappointed to find it was empty.而要改成 and only t
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都可以 但 后者更地道
only to do sth它表示出乎句子主语意料之外的/不如人意的结果