摘要：31．B.that引导主语从句只起连接作用.在从句中不作任何成分.无意义.但不能省略.what除引导主语外.还在从句中作成分.which指一定范围内的“哪一个 ,whether意为“是否 .根据句意“世上的事喜忧交替 可知答案为B.
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-----Did Mr Black resign his post as principal?
-----No,________ was telling a lie.
A. whoever told you that B. those who told you that
C. No matter who told you D. Anyone told you that
A 句意：Mrs Black 辞去校长职务了吗？没有，不管谁告诉你的，他都在说谎。Whoever引导的主语从句，相当于anyone who。如果选B，则those作主语，谓语应用were。 C项引导让步状语从句，不能引导主语从句；D项错误，应改为Anyone who told you that。
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