Câu hỏi: There has been no discernible improvement in the noise levels since lorries were banned.

A. clear

B. obvious

C. thin

D. insignificant

Câu 1: We cannot clean up our polluted rivers and seas overnight.

A. cleared

B. purified

C. honored

D. respected

Câu 2: 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 3: An interesting feature of this park is the Orphanage where lots of orphaned or abandoned animals are taken care of.

A. bad

B. ugly

C. weak

D. dull

Câu 4: His career in the illicit drug trade ended with the police raid this morning.

A. elicited

B. irregular

C. secret

D. legal

Câu 5: He was so insubordinate that he lost his job within a week.

A. fresh

B. disobedient

C. obedient

D. understanding

Câu 6: 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