Our teacher always tell us ________ more English in and out of class.A.speakB.spokenC.to speakD.speaking
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C解析tell后接不定式做宾语补足语，tell sb. to do sth.告诉某人做某事。◆在“形容词/副词+enough+不定式”结构中表“足以能…”，如：He is strong enough to do the work．◆复合结构不定式(for sb. to do sth.)，可做主语、表语、宾语、定语和状语。for本身无意义，sb.可称之为不定式的逻辑主语。如：I think it necessary for him to go there at once.（复合结构不定式做宾语）注意：当作表语用的形容词表示不定式的逻辑主语的性质或特征时，不用for，而用of。如：It is kind of you to help me.（相当于You are kind to help me.）这类形容词有good, nice, kind, wise, clever, foolish, silly, stupid, careless, impolite（不礼貌）等。right, wrong既可用于for sb. to do sth.，也可用于of sb. to do sth.如：It's right / wrongg for him to do the work alone.