(2013·皖南八校联考)Singing with Sun Yang，the swimming champion，face to face is an unforgettable moment， the little girl always treasures.
A. one
B. this
C. that
D. it
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(答案→)A. one
B. this
C. that
D. it
解析：句意：和游泳冠军孙扬面对面的唱歌是一次难忘的时刻，那个小女孩永远珍惜那一刻。此处one是an unforgettable moment的同位语，后接定语从句the little girl always treasures。