题目内容
（请给出正确答案）
[单选题]
There are several ways （） we can cross the river without the help of local villagers.
A.in which
B.across which
C.to which
D.on which
单选题，请选择你认为正确的答案：
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A.A. /wo:rn/
B.B. /wa:rn/
C.C. /wa:rn/
