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
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
A。考查动词短语辨析。句意:在动物世界里,夜晚是专门留出睡觉的时间——纯粹而简单。A项“(专门)留出,拨出”;B项“写下,记下”;C项“动身,出发,引起,引爆”;D项“建立”。根据句意可知选A项。