We have an enquiry for Silicon carbide and would like to ask you

We have an enquiry for Silicon carbide and would like to ask you to send us an offer __________ 1000 metric tons for shipment _______ September.
【正确答案】：for; during(in)
【题目解析】：[解析]句意：我们得到一个碳化硅的询盘，请你报我1000公吨9月交货。an offer for表示“的报 价”；during/in表示“在 期间”，后可接时间段。