Câu hỏi: The _______ by UN troops prevented fighting from breaking out.

A. participant

B. intervention

C. joiner

D. contestant

Câu 1: He formerly worked as a machinist_______ in Boeing's Everett assembly plant.

A. appriciate

B. apprentice

C. appraise

D. approach

Câu 2: The society was set up to______ endangered species from extinction.

A. prevent

B. distinguish

C. preserve

D. survive

Câu 3: Because of people’s______ with the environment, many kinds of plants and animals are becoming rare.

A. supply

B. survival

C. influence

D. interference

Câu 4: All the _______had excellent academic credentials.

A. candidates

B. goverments

C. followers

D. desigers

Câu 5: Installing is firewall is one method of trying to protect against_______.

A. hackers

B. thiefs

C. robbers

D. crooks

Câu 6: The waste water from bath, showers, sinks and_______, and rainwater can be collected in a tank.

A. linguistic

B. official

C. dishwasher

D. operate