题目内容
11．一Waiter，20 for dinner，right？一I'm afraid 25，sir，for drinks are ．（ ）| A． | extra | B． | free | C． | spare | D． | equal |
分析 --服务员，晚饭20，对吗？
--恐怕是25，先生，因为饮料是另外收费的．
解答 答案：A．
首先明确选项中每个单词的意思，A：额外的/另外收费的；B：空闲的/免费的；C：多余的；D：均等的；根据题干推测对话的句意是"--服务员，晚饭20，对吗？--恐怕是25，先生，因为饮料是另外收费的．"，由此判断句子中缺少"另外收费的"一词，故答案为A．
点评 了解每个选项的含义是做好此类题型的关键，还要从句意着手，根据句意作出解答；所以，平时的学习中要多进行积累词汇，才能很好的完成．
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