Mack is very busy; he is a full-time student, while ______ a part-time job.

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问题 Mack is very busy; he is a full-time student, while ______ a part-time job.

选项 A、to hold
B、being held
C、held
D、holding

答案D

解析 考查动词的非谓语形式。由句子结构和选项可知,此处是非谓语动同作状语。动词的非谓语形式有三种:不定式to do表示将来或者目的,现在分词-ing形式表示主动,过去分词-ed形式表示被动。由于hold这一动作由句子主语Mack发出,因此要用其现在分词,选[D]。注意,[B]是被动式的现在分词形式。
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