题目内容
After completing and singing it. Please return the form to us in the envelope _____.
A. providing B. provided
C. having provided D. provide
B
【解析】
试题分析:分析句子结构可知,设空处所填词作envelope的定语,envelope与provide之间为被动关系,故用过去分词作定语。故选B。
考点:考查非谓语动词作定语
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