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B is for breathing.We should ( )that the person can breathe.

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B is for breathing.We should ( )that the person can breathe.
答案是check 为什么不能是be sure
需要详细分析
B is for breathing.We should ( )that the person can breathe.
单独be sure表示一种猜测,认为.比如,i am sure that the person can breathe,我可以肯定他还能呼吸,不合题意,可以用make sure弄清,查明,意思和check接近
你可以说we should make sure that the person can breathe