问题
选择题
What surprised me a lot was that he didn't know ________ the difference between "say" and "speak" lay.[ ]
A. what
B
. that
C. where
D. which
答案
答案：C
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What surprised me a lot was that he didn't know ________ the difference between "say" and "speak" lay.[ ]
A. what
B. that
C. where
D. which
答案：C