原帖由 奶昔妈妈 于 2007-3-21 13:44 发表 上个礼拜刚跟儿子搞过,是他们牛津书上的。应该是"in" I can hear a drill in the street. 又如: I can hear a child in the street. 如物体大一点的,就用"on",如: I can hear ...
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