问题补充：
—I prefer at home on such a rainy day. —So do I.
A. stay; to go out
B. stay; go out
C. staying; to going out
D. to stay; going out
答案：
A. stay; to go out
B. stay; go out
(答案→)C. staying; to going out
D. to stay; going out
解析：perfer doing to doing 是常用固定结构，意为“相比于做…更喜欢做…。”prefer…to…中的to是介词，故选C。意为“在这样的一个下雨天里，我更喜欢呆在家里。”
