Choosing the correct answer to fill in the gaps. We can understand that what is missing from reading problems and options. Sometimes it is a matter of definition. (All the options are the same type. But different meanings), sometimes as the types of words. (This option is all derived from the same or a suffix to the end of the term. Different functions in a sentence that makes a difference. Some words are nouns Word is a verb, etc.), sometimes inflected verbs as President and as ever. Sometimes it is in the correct order in the sentence.