21) Phosphorus is used in paints for highway signs and markers because it is bright at night.
(A) luminous
(B) harmless
(C) adequate
(D) attractive
22) The Supreme Court has a reputation for being just.
(A) stubborn
(B) impartial
(C) humorous
(D) capricious
23) To look quickly through a book is an important study skill.
(A) skim
(B) summarize
(C) outline
(D) paraphrase
24) Einstein's theory of relativity seemed incredible at the time that he first introduced it.
(A) unbelievable
(B) complicated
(C) brilliant
(D) famous
25) the perpetual motion of the earth as it turns on its axis creates the change of seasons.
(A) ancient
(B) rhythmic
(C) leisurely
(D) constant
26) The development of general anesthetics has allowed doctors to operate without the pain once associated with surgery.
(A) fear
(B) protest
(C) rage
(D) anguish
27) In the past, energy sources were thought to be boundless.
(A) without limits
(B) inexpensive
(C) exasperated
(D) organized
28) Library cards will expire when they are not used.
(A) cost more money
(B) cease to be effective
(C) be mailed to the holder's address
(D) be continued automatically
29) Because of a long drought, farmers are doubtful about the prospect of a good yield.
(A) sympathetic
(B) intrepid
(C) dubious
(D) thrilled
30) A compound break is more serious than a simple one because there is more opportunity for loss of blood and infection.
(A) bruise
(B) sprain
(C) burn
(D) fracture