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bebusy的用法求大神帮助hequicklypickedupthetelephoneandpretendedtobeverybusyanimportantcallfromsomeoneinNewYork.答案是answering能用介词不

题目详情
be busy的用法求大神帮助
he quickly picked up the telephone and pretended to be very busy ____an important call from someone in New York.答案是answering 能用介词不
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答案和解析
Be busy 后面跟动词的ing形式!或be busy with后面跟人或物!