Some fish can survive only in salt water, _____________ other species can live only in fresh water.
A、since
B、unless
C、if
D、whereas
Some fish can survive only in salt water, _____________ oth - Unit Five The Water Problem - 大学英语Ⅰ(第三次开课) - 重庆高校在线开放课程平台 | 大学网课搜题引擎