Incorrect inclusion or omission of prepositions

A preposition is often used when one is not needed, or not used when one is needed.

According many critics, Mark Twain's novel Huckleberry Finn is his greatest work and is

one of the greatest American novels ever written.

The preposition to has been omitted from the phrase according to.

Some of themost of spectacular caves are found in the Crimean mountains.

The preposition of should not be used in this phrase. (When most means "majority," it can be used in the phrase most of the. "Most of the people agree...," for example. However, in this sentence, most is part of the superlative form of the adjective spectacular, and so cannot be used with of.

Identify correct and incorrect preposition choice. Underline the prepositions that correctly complete the sentences below.

Wage rates depend (in/on) part (from/on) the general prosperity (of/for) the economy.

(For/To) an injection to be effective (on/against) tetanus, it must be administered (by/within) 72 hours (of/for) the injury.

The invention (of/for) the hand-cranked freezer opened the door (for/to) commercial ice-cream production, and (for/since) then, the ice-cream industry has grown (in/into) a four-billion-dollar-a-year industry.

(At/On) the time (of/in) the Revolutionary War, the North American colonies were merely a long string (with/of) settlements (along/among) the Atlantic Coast (between/from) Maine and Georgia.

The probability (of/for) two people (in/on) a group (of/for) ten people having birthdays (in/on) the same day is about one (in/of) twenty.

Showboats were floating theaters that tied up (at/to) towns (in/on) the Ohio and Mississippi Rivers to bring entertainment and culture (to/at) the people (on/in) the frontier.

.Scrimshaw, the practice (of/for) carving ornate designs (in/on) ivory, was first practiced (by/of) sailors working (by/with) sail needles while (in/on) long sea voyages.

Bird Island, (off/of) the coast (off/of) the Crimea, is famous (for/to) its flocks (of/with) wild geese.

(In/On) order (for/to) an object to be visible, light must travel (from/for) that object (at/to) a person's eves.