问题
选择题
--You forgot your keys when you left home in the morning.
--Good heavens,___________.
A．so did I.
B．so I did.
C．so you did.
D．so did you.
答案
答案：B
对省略的用法考查。注意两人对话中的you和I是同一个人，所以用so +I+did。
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