Disadvantages of using synonyms when speaking

Simple definitions for these words: Command Market Mixed (I need the definitions of the economic system)

And quiet sleep and a sweet dream when the long trick's over which sound device is most notable in this excerpt

The arrogant man sneered

Do Student Activities Make School Better?

Another name for a dependent clause is subordinate clause. True False

When Is The Use Of Military Force Justified?

Which word from the sentence below is an adverb? Lily hunched over her English paper and began to write vigorously so that she could note her every thought.

In "Sympathy," by Paul Laurence Dunbar, the bird beats his wings against the bars and sings for freedom. This symbolizes those who fight oppression and never give up. True or False

Read the excerpt from Walt Whitman's "Song of Myself." The past and present wilt-I have fill'd them, emptied them, And proceed to fill my next fold of the future.

Look up OK in your dictionary. OK (or okay) is a distinctly American term. What is its supposed origin?