TodayIamaddictedtotheRedBook

This noon ,I was addicted to the Red Book to learn English.The following are what I kept in my notebook. 中暑 hvae a hot stroke
我请客 It 's on me.
算我账上 foot the bill
请某人吃饭 treat sb to the meal
我临时有事 Something came up . or Something has come up.
我临时有事，不能去开会。Something came up,I cannot make it to the meeting.