Nancy enjoyed herself so much she visited her friends in Sydney last year.
A. that
B. which
C. when
D. where
网友回答
A. that
B. which
(答案→)C. when
D. where
解析：本题很容易让考生受思维定势的负面影响，见到so马上选择that，殊不知此题考查的是when引导的时间状语从句，句意为：南希去年拜访悉尼的朋友时过得非常开心。如果选A，则句意为：南希玩得如此开心以至于拜访了悉尼的几个朋友。显然，意思不合逻辑。