问题
选择题
Was it on that morning _____ you left for Beijing _____ he discovered our secret?[ ]
A. that; where
B. which; that
C. when; that
D. that; when
答案
答案：C
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Was it on that morning _____ you left for Beijing _____ he discovered our secret?[ ]
A. that; where
B. which; that
C. when; that
D. that; when
答案：C
