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  3. Since the road is wet this morning, ______ last night.

Since the road is wet this morning, ______ last night.

admin2012-12-31  20
问题 Since the road is wet this morning, ______ last night.
选项 A、it must rain
B、it has rained
C、it must have rained
D、it must have been rained
答案C
解析 此题涉及到动词的现在完成时态的使用方法和must的使用方法。“Must+have +动词的过去分词”表示“一定是……”的意思，例如：He must have spent a long time figuring out who has win the lottery this week．(他一定花了很长时间去弄清楚谁中了这星期的彩票。)
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