----How many birds can you see in the tree?
---- . All the birds have flown away.
A. None
B. No one
C. Nothing
D. A few
网友回答
(答案→)A. None
B. No one
C. Nothing
D. A few
解析:考查不定代词的用法。根据下句,鸟全飞走了,因此树上一只也没了。a few“几个”;no one“没有一人”;nothing“没有什么”;none“一个也没有”。