i felt quite _____ what i was supposed to do then.A.unsure of B.uncertain about C.certain about请问这题目为什么是选B 呢,解释下其他两项不能选的原因吧
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![i felt quite _____ what i was supposed to do then.A.unsure of B.uncertain about C.certain about请问这题目为什么是选B 呢,解释下其他两项不能选的原因吧](/uploads/image/z/10344502-46-2.jpg?t=i+felt+quite+_____+what+i+was+supposed+to+do+then.A.unsure+of+B.uncertain+about+C.certain+about%E8%AF%B7%E9%97%AE%E8%BF%99%E9%A2%98%E7%9B%AE%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AF%E9%80%89B+%E5%91%A2%2C%E8%A7%A3%E9%87%8A%E4%B8%8B%E5%85%B6%E4%BB%96%E4%B8%A4%E9%A1%B9%E4%B8%8D%E8%83%BD%E9%80%89%E7%9A%84%E5%8E%9F%E5%9B%A0%E5%90%A7)
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