从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. At that time people would starve if food was difficult _______, especially during the cold winter months.
A. finding B.to find C. found D. to be found
2. The most energetic and important festivals are ______ that look forward_____ the end of winter and to the coming of spring.
A. ones; in B.the ones; / C. ones; to D. the ones; to
3._______was obvious ________the manager of the coffee shop was waiting for Li Fang to leave.
A. This; that B.It; which C. That; which D. It; that
