Câu hỏi: He had a new heart valve _______.

A. added

B. supplanted

C. improved

D. implanted

Câu 1: The factory was fined for______ chemicals into the river.

A. dumping

B. discharging

C. producing

D. exposing

Câu 2: I_______ George on my way home.

A. dropped in on

B. gear up for

C. pair up with

D. look back on

Câu 3: Gavin_______ the idea of dividing the rooms in half.

A. get on with

B. pave the way

C. keep an eye on

D. come up with

Câu 4: 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 5: Do you know the country which you has the hightest life_______ in the world?

A. expectancy

B. objective

C. desire

D. ambition

Câu 6: All the _______had excellent academic credentials.

A. candidates

B. goverments

C. followers

D. desigers