问题补充:
food is hard to find, few birds remain throughout the year.
A. What
B. Which
C. Where
D. That
答案:
A. What
B. Which
(答案→)C. Where
D. That
解析:考查从句,句子food is hard to find不缺少成份,所以只能在关系副词里找,What、Which That引导从句时,可以充当句子成份,可以做主语、宾语等,所以选C,句子意思“那里的食物很难找,经过一年很少的鸟留下”。