情态动词表推测的用法 — 英语填空题
题目
用适当的情态动词填空：While watching the news about the flood, Tom said, 'The roads ___ (not) be passable now, because the water level is still rising. The rescue team ___ have arrived by now—they set off two hours ago, but the village is only one hour away.'（每空一词，第二空表对过去发生事情的肯定推测）