Câu hỏi: The problem of_______ in big cities, which stems from uncontrolled migration from rural areas.

A. overpopulation

B. decrease

C. increase

D. growth

Câu 1: Installing is firewall is one method of trying to protect against_______.

A. hackers

B. thiefs

C. robbers

D. crooks

Câu 2: Some______ animals become tame if they get used to people.

A. wild

B. domestic

C. endangered

D. rare

Câu 3: He had a new heart valve _______.

A. added

B. supplanted

C. improved

D. implanted

Câu 4: All the _______had excellent academic credentials.

A. candidates

B. goverments

C. followers

D. desigers

Câu 5: He formerly worked as a machinist_______ in Boeing's Everett assembly plant.

A. appriciate

B. apprentice

C. appraise

D. approach

Câu 6: Intelligent ___________ are widely used in many fields such as heavy industries, hospital medicine business, and the military.

A. machines

B. service

C. advisement

D. computers