Question

Most whales must come up for air after several minutes, _______ a few can stay u

Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
A. while
B. or
C. for
D. so

Answer 1

答案A

试题分析：考查连词辨析。A当…时；然而；尽管；B否则，或者；C为了，因为；D于是；句意：大部分的鲸鱼几分钟以后一定要出来换气，然而有一些可以在水下待一个小时或者更长的时间。根据句意说明A正确。
考点：考查连词辨析
点评：不同的连词要放在上下文中进行考查，要注意一词多义，如while当…时；尽管；然而；