题目内容
_____ we have enough evidence, we can’t win the case.
| A．Once | B．As long as | C．Unless | D．Now that |
C
解析试题分析：考查连词辨析。根据句意：除非我们有充足的证据，否则我们赢不了这场官司。A一旦；B只要；C除非；D既然。所以答案选C。
考点：考查连词辨析
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