—Sally failed in this math test. She is very sad now.—Let’s go and_______.A.laugh at herB.cheer her upC.let her downD.learn from her
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B解析试题分析：A. laugh at her嘲笑她 B. cheer her up使她高兴起来C. let her down 让她失望 D. learn from her从她那里学习；句意：莎莉数学考试没考好，她现在很伤心。让我们去让她高兴起来。故选B考点：动词短语辨析
点评：词义辨析考的是学生的基础词汇知识，了解每个选项的含义是做好此类题型的关键，对于这类题，可从句意着手。同时，对于平时的学习要多进行积累词汇，考试时才能很好的完成。