Question

40.  ( 2011 安徽，38) My father was preparing for his speech my mother was doing some washing last night.

   A. if   B. while   C. unless   D. until

Answer 1

40. B

40. B句意:昨晚当我妈妈洗衣服时，我爸爸正在为他的演讲做准备。 本题考查状语从句的引导词。if引导条件状语从句；unless = if... not;until直到;while在此表示“与……同时”，符合句意