Peter received a letter just now ______ his grandma would come to see him soon.
A.saidB.saysC.sayingD.to say在线课程C
思路分析：根据句子成分分析可知，空格处不缺少谓语动词，故排除A、B两项。又因D项to say为不定式，表将来，也应排除。C项为现在分词作伴随状语，合题意。
【点评】该题考查非谓语动词，难度适中。非谓语动词是高考的重点、难点、热点，平日学习中要注意把握。