题目

鸟是有羽毛且几乎覆盖全身的卵生脊椎动物，它进行气体交换的场所是（ ） A . 肺 B . 气囊 C . 气管 D . 鳃 答案：AThe ______ man told us his past days before he _______. His _____ made us very sad.   [     ]A. dying; died; death   B. dead; dying; die   C. dead; died; dying   D. dead; dying; death