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_______ in progress, conference participants must turn off their cell phones and
_______ in progress, conference participants must turn off their cell phones and
游客
2025-06-19
20
管理
问题
_______ in progress, conference participants must turn off their cell phones and digital cameras.
选项
A、While
B、Although
C、Ever
D、During
答案
A
解析
逗号前面的部分是“连词+介词短语”做状语的用法,这里空格后是“介词+名词”。如果出现形容词或者分词也是一样的用法。空格内应填入连词,在分词做状语的情况下,有时也可以不出现连词。在“连词+-ing/p.P.”的结构中,分词是起形容词的作用,而“介词+名词”也有形容词的作用,所以用法相当于分词做状语。
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