【单选题】【消耗次数：1】
Im not very keen [填空] sports．
①
in
②
on
③
at
④
for
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相关题目
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A: Im keen on researching my family history. B: [填空]
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I do too.
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Neither do I.
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Arent you?
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So am I.
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It happened to be very cold____ the morning of our sports meet. ?
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A: Mary, Im very sorry to tell you that I wont be able to come this Friday. B: Whats the matter? [填空].
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Im really sorry for that
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随机题目
【单选题】
上下颌磨牙的主要区别不正确的是（）
①
上颌磨牙牙冠牙合面呈斜方形；下颌磨牙牙冠牙合面呈长方形
②
上颌磨牙牙冠近远中径大于颊舌径；下颌磨牙牙冠颊舌径大于近远中径
③
上颌磨牙牙冠较直；下颌磨牙牙冠倾向舌侧
④
上颌磨牙的颊尖锐而舌尖钝；下颌磨牙的舌尖锐而颊尖钝
⑤
上颌磨牙多为三根；下颌磨牙多为双根