When I got back home I saw a message pinned to the door ____

问题描述:

When I got back home I saw a message pinned to the door ____
“Sorry to miss you; will call later.” (NMET99 25)
A.read B.reads C.to read D.reading
诗选C还是D?请说明理由.

选D.现在分词作定语修饰 a message