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

A. appriciate

B. apprentice

C. appraise

D. approach

Câu 1: The waste water from bath, showers, sinks and_______, and rainwater can be collected in a tank.

A. linguistic

B. official

C. dishwasher

D. operate

Câu 2: I’m trying to_______ the amount of sugar I eat.

A. cut down on

B. bear out

C. bring in

D. team up with

Câu 3: He had a new heart valve _______.

A. added

B. supplanted

C. improved

D. implanted

Câu 4: The problem of_______ in big cities, which stems from uncontrolled migration from rural areas.

A. overpopulation

B. decrease

C. increase

D. growth

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: We kept in _______for a while after college.

A. touch

B. pay

C. well

D. chose