Câu hỏi: Due to an increase in population and the use of nearby land for farming, there are toxic levels of chemicals in the water.

A. fall

B. lowness

C. shortage

D. illness

Câu 1: His career in the illicit drug trade ended with the police raid this morning.

A. elicited

B. irregular

C. secret

D. legal

Câu 2: The US troops are using much more sophisticated weapons in the Far East.

A. expensive

B. complicated

C. simple and easy to use

D. difficult to operate

Câu 3: Golf wear has become a very lucrative business for both the manufacturers and golf stars.

A. unprofitable

B. impoverished

C. inexpensive

D. unfavorable

Câu 4: This national park is special because it has plants and animals from both tropical and temperate zones.

A. warm

B. pole

C. cool

D. wet

Câu 5: Nutritionists believe that vitamins circumvent diseases.

A. defeat

B. nourish

C. help

D. treat

Câu 6: Toxic chemicals continue to be dumped in the North Sea.

A. stop

B. go on

C. follow

D. begin