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You must fully charge the battery before________your phone for the first time.A、
You must fully charge the battery before________your phone for the first time.A、
游客
2023-09-29
31
管理
问题
You must fully charge the battery before________your phone for the first time.
选项
A、using
B、use
C、to use
D、are using
答案
A
解析
第一次使用手机时,必须将电池充满。考查介宾短语。空格前的before是介词,其后要接名词或动名词。选项中只有A项using(使用)是动名词,故选A项。B项use为动词原形,C项to use为动词不定式,D项are using为现在进行时,都不符合语法要求。
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