【題目】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……是……的，固定句型，be careful with小心……固定短語，故答案選D.A項中careful為形容詞，不能接在to后面，排除A; B項不符合固定句型，排除B; C項to后接be,排除C.

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