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【题目】It’s important _________ with fire.

A. to careful

B. being carefully

C. to being careful

D. to be careful

【答案】D

【解析】句意:小心防火非常重要。it’s +adj+to do做…………的,固定句型,be careful with小心……固定短语,故答案选D.A项中careful为形容词,不能接在to后面,排除A; B项不符合固定句型,排除B; C项to后接be,排除C.

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