When you wanted to buy something in the past，what would you do？You would go out and buy them in a store or supermarket．But now in 21st century，there is a new way to do-it is to buy it online．How incredible（不可思议），isn't it？
There are many good reasons to shop online．First of all，it is convenient（方便的）．When you want to buy something，you do not need to go out，but to sit before your computer and look through the web pages such as JOYO or EBAY．Then you choose what you want and buy it with just a click of your mouse．Shopping online can help you save lots of time，money and energy．
The advantage of shopping online is that there are much more goods online which you have never seen in the store．For example，some books printed several years ago might not be sold in the stores，but you can buy them online!
Finally，because of the technology improvement，shopping online has become safe．You can check the information of the owner before you decide to buy and pay for the goods．You can make payment online and you don't need to worry that your information may be stolen．
If you want to enjoy shopping，you can choose online shopping to get what you want．
回答下面5个问题，每题答案不超过8个词．
71．How did you buy something in the past according to the passage？___
72．What can shopping online help you save？___
73．Where can you buy books that aren't sold in the store？___
74．Why has shopping online become safe？___
75．What can you do before you decide to buy and pay for the goods online？___．
