while&whereas做连词区别

题目

while&whereas做连词区别
1.The system provides a way for companies to remain globally competitive _______ avoiding market cycles and the growing burdens such as healthcare costs and pension plans.
A) but B) while C) whereas D) and
2.He thought I was lying,______ I was telling the truth.
A) while B) whereas C) therefore D) however
以上两句话答案都是B,但是区别在哪里?都做连词,而且都可以引导句子表示转折和对比,

答案

前 者 用 于 同 步 对 等 的 两 个 情 况 ,有 "同 时" 的 意 味 .后 者 强 调 第 二 部 分 ,有 "然 而 、 却" 的 意 思 .
They discuss the issue while eating.
They like the red one,whereas we prefer the white one.