Câu hỏi: I_______ George on my way home.

A. dropped in on

B. gear up for

C. pair up with

D. look back on

Câu 1: We kept in _______for a while after college.

A. touch

B. pay

C. well

D. chose

Câu 2: Installing is firewall is one method of trying to protect against_______.

A. hackers

B. thiefs

C. robbers

D. crooks

Câu 3: 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

Câu 4: _______ does not exist yet, but scientists are working hard to create computers that can think like human beings.

A. Advancement

B. Destruction

C. Intervention

D. Artificial intelligence

Câu 5: We all regard pollution as a.......... matter to human beings.

A. solemn 

B. great

C. serious 

D. huge

Câu 6: This_______disease caused a lot of complications during the treatment procedure.

A. situation

B. difficult

C. life-threatening

D. weak