He is looking forward his father.
A. of receiving
B. of hearing from
C. to hear from
D. to hearing from
网友回答
A. of receiving
B. of hearing from
C. to hear from
(答案→)D. to hearing from
解析：考查动名词做宾语：句意：他渴望收到爸爸的来信。look forward to doing盼望做…，to是介词，后面接动名词做宾语，因为收到某人来信是hear from sb，选D。