Câu hỏi: Rapid run-off would cause frequent floods and leave little water during fry seasons.

A. sometimes

B. unusual

C. irregular

D. little

Câu 1: There is growing concern about the way man has destroyed the environment.

A. ease

B. attraction

C. consideration

D. speculation

Câu 2: He revealed his intentions of leaving the company to the manager during the office dinner party.

A. disclosed

B. concealed

C. misled

D. influenced

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: 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 5: When did Nguyen Hue defeat Thanh enemies?

A. peoples

B. animals 

C. friends

D. kids

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

A. stop

B. go on

C. follow

D. begin