【题目】After completing and signing it, please return the form to us in the envelope ________.
A. providing B. provided
C. having provided D. provide
【答案】B
【解析】考查非谓语动词的用法。此处动词provide与其逻辑主语envelope之间是被动关系,在句中作定语,相当于which is provided。句意为:完成并签名后,请把表格放入我们提供的信封内送回。选B。