问题描述：
we have received your enquiry of 15 october_in which_ you advise us of your interest in cashmere.
此句为什么要选in which?
we have received your letter of septembe 12,_____ we are glad to know that you are interested in our electric heaters.( which at which in which from which）要选哪个答案呢?
此句为什么要选in which?
we have received your letter of septembe 12,_____ we are glad to know that you are interested in our electric heaters.( which at which in which from which）要选哪个答案呢?
问题解答：
我来补答展开全文阅读