Write two sentences for each of the word pairs. correctly use each word in a sentence.

- "the basic difference between keywords and subjects is that subjects (or "subject headings") have been predetermined, while keywords have not. a keyword is an easy place to start because you can use any word that seems to fit your search; this is called "natural language" searching."

an interrogative sentence is a type of sentence that asks a question, as opposed to sentences that make a statement, deliver a command, or express an exclamation. interrogative sentences are typically marked by inversion of the subject and predicate; that is, the first verb in a verb phrase appears before the hope i