【题目】When Tom got home he saw a message on the table, _______ he would be back soon.
A.read
B.reads
C.to read
D.reading

【答案】D
【解析】考查现在分词。句意：Tom回到家是时候看到桌上有一张纸条，写着他很快回来。此处reading 是伴随状语，故选D。