crack the
题目
crack the
crack vt.使发出爆裂声;使破裂,使爆裂
whip n.n.鞭子,抽打,车夫,搅拌器
原句是：a large portion of duties went undone for extended periods until Dad cracked the whip.
答案
hey hey,it means:
because someone didn't carry out most of his duties,his dad 发彪 la!
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