kill two birds with one stone
at sixes and sevens
the apple of someone's eyes
add fuel to the fire
cast one's pearls before swine   对牛谈琴
put all one's eggs in one basket  孤注一掷
penny-wise and pound- foolish  小事精明大事糊涂的人
like looking for a needle in a haystack  大海捞针
Money makes the mare go.   有钱能使鬼推磨.
a dog in the manger       占着茅坑不拉屎的人
through thick and thin    同甘共苦

1.一箭双雕
2.乱七八糟
3.掌上明珠
4.火上浇油