选C
had Bob walked farther=if Bob had walked farther =
一定要用过去完成时 这里是对过去情况的虚拟语气.had Bob walked farther=if Bob had walked farther
what would hane happened ____,as far as the river bank?
what would hane 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
A Bob had walked farther
B if Bob should walk farther
C had Bob walked farther
D if Bob walked farther
英语人气：979 ℃时间：2020-01-31 07:03:48
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