问题
选择题
To our disappointment, it was _____ made him so upset_____ wasn't known by us.[ ]
A. that; that
B. what; that
C. what; who
D. that; who
答案
答案：B
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To our disappointment, it was _____ made him so upset_____ wasn't known by us.[ ]
A. that; that
B. what; that
C. what; who
D. that; who
答案：B