When I got back home I saw a message pinned to the door“Sorry to miss you will call later

问题补充：

When I got back home I saw a message pinned to the door“Sorry to miss you, will call later.”

A. read

B. reads

C. to read

D. reading

答案：

A. read

B. reads

C. to read

(答案→)D. reading

解析：本题考查-ing形式作定语。此题中a message 由pinned to the door 说明其位置，由 “sorry …later”说明内容。因“a message + read”之间建立的是主动的主谓结构，故用-ing形式，选择D项。此题难度较大。