问题补充:
According to the recent reports, one of the animals, crocodile, is in danger of dying out.
A. the; the
B. the; /
C. /; /
D. /; the
答案:
A. the; the
(答案→)B. the; /
C. /; /
D. /; the
解析:第一空是定冠词the+可数名词的单数形式,表示类别,第二空是固定词组in danger“处境危险”,类似的零冠词现象的词组有:at war, at peace, at table, at work, at college, at sea, by force, by air, by sea, by train, in bed, in hospital, in peace, in ink, on foot, on sale, on leave, on fire, on business, in public, in secret等。