If you have decided which bike to buy you can for it on the Internet and we will send it

问题补充：

If you have decided which bike to buy, you can for it on the Internet and we will send it right to your home.

A. take an order

B. carry out an order

C. keep order

D. place an order

答案：

A. take an order

B. carry out an order

C. keep order

(答案→)D. place an order

解析：短语辨析。A.接受订单 B.执行订单 C.维持秩序 D.订购；发出订单。句意：如果你已经决定买哪一辆自行车，你能从网上下订单…….选D。