题目内容
It was on September 25th ______ China’s first aircraft carrier, named “Liaoning”, was handed over to PLA Navy.
A. when B. who C. that D. what
C

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题目内容
It was on September 25th ______ China’s first aircraft carrier, named “Liaoning”, was handed over to PLA Navy.
A. when B. who C. that D. what
C