There are many new ways of shopping , and online shopping is one of them. You can buy almost everything on the Internet, and it's very easy. First, you choose something--clothes, tickets, a mobile phone, even a new computer--and pay for it. Then you receive it a few days later by post. Online shopping has several advantages. First, you can shop at any time. The shops are always open. Second, shopping usually takes a lot of time. But to shop on the Internet you only need a computer and a mouse! You can also compare the prices of the same product and spend a lot... or save money. But many people like going out and shopping with friends. They don't like shopping on the Internet because they can't see the product or try the clothes on. Also paying over the Internet isn't always safe. Online shopping is changing our way of life. One day no one will go to the shops any more, because you'll be able to buy anything on the Internet, and you will be able to receive it anywhere in the world at any time! According to the passage, you pay for online shopping   _   you receive it.
before after when as