1.Let the cat out of bag.
泄露了秘密；走漏了风声.
2.Learn not and know not
不学无术.
3.Never too late to mend
过而能改,善莫大焉；亡羊补牢,犹未晚也
1.in twos and threes
三三两两
2.again and again
一而再再而三
3.to the nearest whole number
最接近的整数
4.all around/far and near
四面八方
5.be perfect in everyway
十全十美