---How much is _______ for a schoolbag?
---Experts say students should carry_______ more than 10 or 15 percent of their body weightA.far more; noB.too much; notC.very much; anyD.many more; much
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B解析这题考查词组;第一空填too much“太多”，第二空填not ，not more than“最多”，句意是：--对书包来说多少是太多？--专家说学生背的东西最多是身体重量的10%或15%选B。