题目内容：

I could not afford to rent a house like that ,__ it.
A let alone to buy B let alone buy C to say nothing to bay
D say nothing buying
回答 解释为何选择B

优质解答

这里的let alone是更不用说的意思,相当于Not to mention to do sth
let alone 的用法是let alone do/done sth 固定结构
这句话的意思是那样的房子我连租都租不起,更不用说买了.
例如 Their ancestors had been dirt poor and never saw royalty,let alone hung around with them