语法与词汇 4.The new director made it clear that his staff were not to accept gifts from clients, ______.

【正确答案】 A

【答案解析】本题考查让步状语从句的倒装。由whether引导的让步状语从句中，如果谓语动词是be，此时whether省略，主谓语颠倒，此时动词必须用be，没有人称、数和时态的变化，故答案为[A]项。