I.单项选择（共15小题；每小题1分，满分15分）
从每小题的A.B.C.D四个选项中，选出可以填入空白处的最佳选项。
1. Laughter is ____ sun that drives winter from _____ human face.
A. the; / B. the; the C. /; the D. a; /
2. As it is raining heavily, I would rather _ at home than __ out with them.
A. stay; going B. staying; going C. staying; go D. stay; go
3. Sweet memories as I looked at the pictures which were taken at the beach last summer.
A sorted out B look down upon C ended up D. crowded in
