问题
选择题
What would have happened , as far as the river bank? [ ]
A. Bob had walked farther
B. if Bob should walk farther
C. had Bob walked farther
D. if Bob walked farther
答案
答案：C
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What would have happened , as far as the river bank? [ ]
A. Bob had walked farther
B. if Bob should walk farther
C. had Bob walked farther
D. if Bob walked farther
答案：C