重点讲解：
1. have no idea
不知道；不清楚；想象不到；
eg. 'Is she coming by coach?' — 'Well I've no idea.'
“她坐长途汽车来吗？”——“哦，我不知道。”
eg. I had no idea of the gaffe which I was committing.
我不清楚我犯了什么错误。
eg. You have no idea how depressed it made me.
你都想象不出这事令我多么沮丧。
2. have a sale
廉售；打折；
eg. The shop is having a sale to clear old stock.
为出售存货商店正在减价甩卖。
eg. We are to have a sale. This computer will be half price.
我们计划下周削价销售。这台电脑将半价销售。
eg. The company decided have a sale to reduce its inventory.
公司决定大甩卖以减少存货。
