问题补充:
In much of the animal world, night is the time for sleep—pure and simple.
A. set aside
B. set down
C. set off
D. set up
答案:
(答案→)A. set aside
B. set down
C. set off
D. set up
解析:
试题分析:句意:在大多数动物的世界里,夜晚纯粹是留下来用以睡眠的时间。A搁置,留出;B记下,制定;C出发,动身,引燃;D建立,成立。根据句意可知答案选A,其他不符合语境。