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: You can slide the front seats forward if necessary.

A. back

B. beside

C. above

D. under

Câu 2: Golf wear has become a very lucrative business for both the manufacturers and golf stars.

A. unprofitable

B. impoverished

C. inexpensive

D. unfavorable

Câu 3: When did Nguyen Hue defeat Thanh enemies?

A. peoples

B. animals 

C. friends

D. kids

Câu 4: There has been no discernible improvement in the noise levels since lorries were banned.

A. clear

B. obvious

C. thin

D. insignificant

Câu 5: 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 6: We cannot clean up our polluted rivers and seas overnight.

A. cleared

B. purified

C. honored

D. respected