单项选择题
Our sewing machines （） fast, and there have been numerous enquiries about them.
A.are sold B.selling C.are selling D.are being seold
单项选择题 Please note that our offer remains firm （） ten days for your acceptance.
单项选择题 We hole that you will find many items of （） to you.
单项选择题 We shall highly appreciate （） if you will send us a brochure and two sample books by air immediately.
