问题
选择题
______ returning home, she found a note _________ to the door, reading: “Call in later.”
A．On; attaching
B．On; attached
C．At; attaching
D．At; attached
答案
答案：B
本题考查介词和非谓语动词。便条note是被粘贴在门上的，所以用过去分词表示被动。On doing sth表示一……就……。
