Passage 1Virtually all e-commerc

Passage 1
Virtually all e-commerce sites accept credit ceards as their primary form of payment. To accept credit card, you need a merchant account with a bank. A payment gateway is simply a service which connects your Web site with the bank. While there's a bit more to it than that, in essence that's all it is -- a way to take payments online.
There are three basic types of payment gateways. The first is an API(Application Programming Interface). This means that the customer never sees the payment gateway Web site -your shopping cart talks to it seamlessly in the background This is generally the best option as it's a transparent experience for the shopper, rather than being transferred to another site at the crucial moment of taking the money.
The second type is a third-party payment gateway. The customer starts the checkout process on your site, but completes payment on the payment gateway site. While this can be simpler to set up in some cases, the experience is unsettling for the customers, and you'll probably lose a few sales.Some third-party payment gateways allow you to customize the page design.
There are also integrated payment gateways. In this scenario, you don't need a merchant account from your bank-the payment gateway does everything for you. For start-up businesses, this can be an easy start. Generally the fees are higher for an integrated service, but the trade-off is simplicity for the shop owner. The best known integrated gateways are PayPal and 2Checkout.
12.A payment gateway is simply a service which connects your Web site with the _______.
A、bank
B、customer
C、company
D、world
【正确答案】：A