Review indefinite articles
Test yourself. Type either a, an, or n (no article) in each box. Then check your answer by clicking on the button 
next to each box.
The Internet, the world's most popular communication medium, is the future for data communication. Nowadays, computers can receive TV signals, decode video signals and function as fax machines. Using the computer, it is now much faster to send an email than letter to relative overseas. The time taken on the Internet to transfer information from one site to another may be only a few minutes.
But the problem is controlling authorised access to information on the Internet, since messages can be so easily posted around the world. This means that children can get access to pornography. Control of access to the Internet will be major project for the computer industry. Such control could be achieved by checking the user's ID and age. But what about children who use their parents' account or that of another older relative? These are the problems we have yet to consider.
n,a,a,n,n,n,n,n,n,n,a,n
Yes, no article is required because the noun communication is an uncountable noun. Here, the focus is on the process of data communication rather than a particular communication (or message). Uncountable nouns do not take a, an, or a final s. If the writer's focus in this sentence was on the type (or system) of communication, it would be appropriate to use the countable plural form, data communications.
Yes, that is correct. A has the meaning, one. In the example ( a letter), a is used to introduce a singular, countable noun beginning with a consonant. Compare the phrases: a letter with data communication.
Yes, that is correct. A has the meaning, one. In the example ( a relative), a is used to introduce a singular, countable noun beginning with a consonant.
Yes, no article is required because the noun information is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as a piece of information or as two pieces of information.
Yes, no article is required because the noun, access, is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as one point of access or as two points of access.
Yes, no article is required because the noun information is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as an item of information or as two items of information.
Yes, no article is required because the noun access is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as one type of access or as two types of access.
Yes, no article is required because the noun pornography is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as one example of pornography or as two examples of pornography.
Yes, no article is required because the noun control is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as one type of control or as two types of control.
Yes, no article is required because the noun access is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as one type of access or as two types of access.
Yes, that is correct. A has the meaning one. It is used to introduce a singular, countable noun beginning with a consonant, such as project.
Yes, no article is required because the noun control, is an uncountable noun with a general meaning. Uncountable nouns do not take a, an, or a final s. You can quantify this noun in other ways: as one type of control or as two types of control.
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
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No, that is incorrect. What would be your next try?
No, that is incorrect. What would be your next try?
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