2. 外语
  3. The tremendous heat at a star’ s core,______ tremendous gravity, joins the nuclei of hydrogen atoms.

The tremendous heat at a star’ s core,______ tremendous gravity, joins the nuclei of hydrogen atoms.

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问题 The tremendous heat at a star’ s core,______ tremendous gravity, joins the nuclei of hydrogen atoms.
选项 A、combined with
B、having combined with
C、combining with
D、being combined to
答案A
解析 本题考查分词短语结构作状语。该分词结构combine with与主语the tremendousheat是被动关系，应当用过去分词，且与主句的谓语动词间并不强调动作的先后次序，无需用完成时态。故应选A。此处的分词结构combined with以插入语的形式出现在句中。
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