单选题：听录音，回答以下问题：Why do people need to do arm exercises?

题目分类：专四
题目类型：单选题
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题目内容：

听录音，回答以下问题：
Why do people need to do arm exercises? A．Because their arms are too fat．
B．Because their arms are too flabby．
C．Because arm exercises can help lower the blood pressure．
D．Because ann exercises can keep them healthy．

参考答案：

答案解析：

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分类：专四题型：单选题