单选题 Before it became one most important symbol for e-mail, the @ symbol (符号) was used to show the cost or weight of something. For example, if you bought 6 apples, you might write it as 6 apples@ $ 1.10 each.
With the introduction of e-mail came the popularity of the @ symbol. The @ symbol or the "at" sign separates a person's online user name from his mail server address. For instance, joe@ uselessknowledge. com. Although it is widespreadly used on the Internet, there is really no official name for this symbol. Nobody knows how the @ symbol comes on to use?
History tells us that the @ symbol was from the tired hands of the monks (和尚). During the Middle Ages before the invention of printing presses, every letter of a word had to be copied by hand for each copy of a published book. The monks looked for ways to shorten the word "at". As a result, the monks circled around the "a" and made the easier symbol.

单选题 What does "6 apples @ $ 1.10 each" mean?
A. It means "each apple costs $ 1.10".
B. It means "six apples costs $ 1.10".
C. It means "six apples, each apple costs $ 1.10".

单选题 Why was the @ symbol used more and more popularly?
A. Because of the introduction of e-mail.
B. Because the apples are more and more.
C. Because all countries have a rule.

单选题 What is the official name of this symbol?
A. There is really no official name for this symbol.
B. Its name is "at".
C. Its name is "symbol/

单选题 How did the monks publish a book during the Middle Ages?
A. They used a printing press.
B. They use their hands to copy each word.
C. They used a machine.

单选题 Why did the monks make the symbol?
A. Because it is more beautiful than the word "at".
B. Because they disliked the word "at".
C. Because they wanted to shorten the word in order to copy it more easily.