I’ve asked him __________ us for dinner, but he said he was quite busy.A.joiningB.to joinC.joinedD.join
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B解析试题分析：句意：我已经让他和我一起吃晚饭了。可是他说他很忙。ask sb. to do sth. “请/让某人做某事”，固定搭配，故选B.考点：ask sb. to do sth.
点评：动词的固定句型是中考的必考语言点，多数出现在单项选择和完形填空中。常考的如tell ab to do sth等这些句型要记忆在心，同时他们的否定形式也是常考的，否定形式直接在to 之前加not。