2021年乐山市中考录取分数线，将于7月中下旬公布！请考生家长注意收藏 

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本文是一篇科普文，主要介绍了维生素D的一些情况。

1．During the winter months，people________.

A．aren't able to meet their deadlines

B．often don't dress warmly enough

C．generally like to remain indoors

D．leave lots of work for others to do

解析：选C　细节理解题。根据第一段中的“In the dead of winter，we don't typically think about spending time outdoors, but according to many physicians we should.”可知，在冬天人们愿意待在室内。