题目内容
The villagers dug many tunnels _____ they could fight against the enemies.
| A．by which | B．through that | C．through which | D．to which |
C
解析试题分析：考查定语从句：句意：村民们挖了很多隧道通过这些隧道他们可以和敌人斗争。先行词是tunnels，定语从句中缺少的是through tunnels，用介词through+关系代词which引导定语从句，选C。
考点：考查定语从句
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