We shall be glad to send you sample books and pamphlets of our n

We shall be glad to send you sample books and pamphlets of our new products ______.
A、at your request
B、for your request
C、as your request
D、with your request
【正确答案】：A
【题目解析】：句意：应你方要求，我方乐于寄给你方我们最新产品的样品书和小册子。at one's request/at the request of sb. 表示“应某人之请求”。