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To keep children safe, we ___________ put the things like knives and medicine away in our house.

A. may B. should C. can D. might

B 【解析】句意：為了保護孩子們的安全，我們應該把刀和藥之類的東西放在家里�？疾榍閼B(tài)動詞辨析。A. may可以；B. should應該；C. can能夠；D. might可能。根據句意，本句是一種委婉的說法，A、C、D三項都沒有這種用法，故選B。
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