My dad and my mom haven't talked to each other ever since they were divorced. I've been acting as a go-between for them.
 go-between middlemanmiddleman 指雙方交易生意中間的人
自從我父母離婚後他們就再也沒有說話, 我就成了他們的中間人.< >
She is shy, but when there is a guest at home, she becomes excitd and hyperactive and out of control.