What does it mean?

Dr. Rene Dubos, a French physician who came to the United States in 1924, searched for substances that would check the growth of bacteria.

• restrict

• investigate

The root of the horseradish plant has a biting taste.

• chewing

• sharp

• sarcastic

The double-bass is shaped like a viola and has a deep, rich tone.

• valuable

• resonant

• abundant

A public library is a resource the entire community can draw on.

• illustrate

• approach

• use

There is a New England influence in southern Ohio, manifesting itself in white churches and village greens.

• a New England influence

• southern Ohio

Florists often refrigerate cut flowers to protect their fresh appearance.

• florists'

• flowers'

A flat kite needs a tail to supply drag and to keep the kite pointed toward the sky. A simple one consists of cloth strips tied end to end.

• kite

• tail

• sky

A number of sculptors have rejected the abstractions of minimalist artists. These sculptors have developed a style of extreme realism involving ordinary subjects.

• extreme realists

• minimalists