问题
选择题
The TV play is about a true story _____happened in Mianyang in 1998.[ ]
A. it
B. what
C. that
D. when
答案
答案：C
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The TV play is about a true story _____happened in Mianyang in 1998.[ ]
A. it
B. what
C. that
D. when
答案：C