____ range in color from pale yellow to bright orange.

• Canaries

• Canaries which

• That canaries

• Canaries that are

Carnivorous plants ____ insects to obtain nitrogen.

• are generally trapped

• trap generally

• are trapped generally

• generally trap

A federal type of government results in ____.

• a vertical distribution of power

• power is distributed vertically

• vertically distributed

• the distribution of power is vertical

February normally has twenty-eight days, but every fourth year, ____ has twenty-nine.

• there

• its

• is a leap year

• a leap year, it

Evidence suggests that one-quarter of operations ____ bypass surgery may be unnecessary.

• they involve

• involve

• involving

• which they involve

____ a tornado spins in a counterclockwise direction in the northern hemisphere, it spins in the opposite direction in the southern hemisphere.

• However

• Because of

• Although

• That

The Caldecott Medal, ____ for the best children's picture book, is awarded each January.

• is a prize which

• which prize

• which is a prize

• is a prize

Sports medicine is a medical specialty that deals with the identification and treatment of injuries to persons ____.

• sports are involved

• involved in sports

• they are involved in sports

• sports involve them

The Wilmington Oil Field, in Long Beach, California, is one of ____ oil fields in the continental United States.

• productive

• the most productive

• most are productive

• productivity

Thunder occurs as ____ through air, causing the heated air to expand and collide with layers of cooler air.

• an electrical charge

• passes an electrical charge

• the passing of an electrical charge

• an electrical charge passes