1.His business has gone off without a _____.（一帆风顺）
2. You have to make good use of time. After all, every time _____.（一刻千金）
3. I am happy to know that all have ended in _____ about him.（烟消云散）
4. The _____ of the election just bit the _____.（一败涂地）
5. His comment on the current affairs always ______ the right _____ on the head.（一针见血）
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