单选题：请在第(64)处填上正确答案。

题目内容：

请在第__(64)__处填上正确答案。 A．running
B．improving
C．learning
D．dropping

参考答案：【答案仅供学习，请勿对照自行用药等】

答案解析：

根据材料，回答问题。 How One Simple Movement Can Let Slip the Secrets

根据材料，回答问题。 How One Simple Movement Can Let Slip the Secrets of the MindBody lang

分类：理工类题型：单选题

Radiocarbon ting techniques can be used to identify the age of the earth.A．Right

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For urban areas this approach was wholly inadequate.A．really B．basically C．funda

分类：理工类题型：单选题

Professional ballet was first performed in _________.A．France B．Italy C．Russia D

分类：理工类题型：单选题

Traffic-free shopping streets first developed in __________A．pedestrians B．north

分类：理工类题型：单选题