Câu hỏi: For environmental safety, we need to find ways to reduce emission of fumes and smoke of factories.

A. leak

B. release

C. poison

D. pollutant

Câu 1: When did Vietnam _________ the association of Southeast Asian Nations?

A. eject

B. refuse

C. improve

D. join

Câu 2: The advances of commercial airplanes resulted in a shrinking world.

A. decreasing

B. reduced

C. smaller

D. compressing

Câu 3: The soldier getting _________ when rescuing the little boy is now takne to the hospital.

A. amused

B. scared

C. wounded

D. interested

Câu 4: Up to now, ASEAN has got ten _____________.

A. members

B. agents

C. states

D. enterprises

Câu 5: Nylon is a man-made fibre, the use of which has helped more people to have cheaper and more colourful clothes to wear.

A. natural

B. plastic

C. synthetic

D. artificial

Câu 6: The authority has made a lot of great efforts ________ endangered species.

A. to save

B. to kill

C. to do

D. to store