put two and two together 依据事实推理
Two heads are better than one. 三个臭皮匠，顶个诸葛亮。
There are no two ways about it. 别无选择；毫无疑问的
be of two minds 朝三暮四
in two shakes of a lambs tail 立刻；非常快
kill two birds with one stone 一箭双雕；一石二鸟
Two wrongs dont make a right. 错错不能对 不可以借助其他人的错误来掩饰我们的错误
Twos company, threes a crowd. 两人成伴，三人不欢。
give three cheers for 欢呼三声; 三呼万岁
six of one, half a dozen the other 半斤八两
in seventh heaven 暗喻心情极为快乐、满足
on cloud nine 开心得飘飘然
dress to the nines 穿着很时髦华丽
a hundred to one shot 百分之一的可能；表示可能性非常小
forty winks 打盹
at the eleventh hour 最后一刻