问题补充：
When I got home I got a message pinned on the door, , “Sorry to miss you. Will call later”
A. read
B. to read
C. reads
D. reading
答案：
A. read
B. to read
C. reads
(答案→)D. reading
解析：
这题考查现在分词做状语的用法：句意是：当我到家时，我发现门上贴着一条消息，写着：抱歉没见到你，会晚些打电话的。消息写着是主动的关系，用现在分词。选D。
