单选题：The author brushed his teeth over and over.

题目内容：

The author brushed his teeth over and over. A．torelieve himself of the pressur
B．to ease his toothach
C．to shake off the col
D．to remove the dir

参考答案：

答案解析：

When the cover:diminishes in the coming decades,temperature_

When the cover:diminishes in the coming decades,temperature_________

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