3. ―It is rather cold here. Shall we light a fire?

―No,we______. Because things here are easy to catch fire.

3. mustn't mustn't表示"禁止，不允許"。答語句意："不，我們不允許在這兒生火，因為這里的東西都是易燃物。"

題目來源：全品作業(yè)本高中英語必修3新課標人教版 > Period Two Grammar

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