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B) 根据句意,用所给单词的适当形式填空。
6. It’s not a good idea to travel in (north) cities in winter because it is too cold.
6. northern
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B) 根据句意,用所给单词的适当形式填空。
6. It’s not a good idea to travel in (north) cities in winter because it is too cold.
6. northern