1. Muscles (A)who are given (B)proper exercise (C)result to stimuli quickly and powerfully and are said to be in tone.

2. Navigators on ships and aircraft use a compass to determine _________ they are heading.

(A) the direction in which
(B) to where the direction
(C) that direction of which
(D) where the direction

3. Of 120 (A)minerals known) to have been used (B)as gemstones, only about 25 are in (C)common use in (D)today jewelry.

4. One of the thirteen original (A)state of the United States, North Carolina (B)lies on the Atlantic coast (C)midway between New York (D)and Florida.