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In winter, we must pay attention to _________.

A. keep warm       B. keep warmly  

C. keeping warm    D. keeping warmly

 

【答案】

A

【解析】

试题分析:短语pay attention to中to是不定式符号,后面接动词原形;本题中keep是系动词,后面接形容词作表语。结合语境可知选A。

考点:非谓语动词

点评:to既可以作为介词来使用,又可以作为不定式符号来使用,并且这两种词性后面所接的动词形式完全不同。所以平时才熟记相关短语的同时,也要对to的词形多加了解。

 

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