We won’t have safe neighborhoods unless we’re always ______ on drug criminals.

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问题 We won’t have safe neighborhoods unless we’re always ______ on drug criminals.

选项 A、tough
B、rough
C、thorough
D、enough

答案A

解析 tough:顽强的,耐用的,难忍受的,艰难的,难答的,有暴力倾向的,be tough on:严格要求,对……来说困难,严厉打击;rough:粗糙的,粗略的,凸凹不平的,有暴风雨的,无礼貌的;thorough:彻底的,全面的;enough:足够的
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