Be . The ice is thin. You must skate .

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问题 Be ______ . The ice is thin. You must skate ______ .

选项 A、care, carefully
B、careful, carefully
C、carefully, careful

答案B

解析 Be careful是提醒对方注意、小心某种危险的提示性用语。短语Look out和Take care与它意思相同，意为“小心，注意，当心”。skate是动词，应用副词carefully修饰它。

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公共英语一级笔试

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