Gun control is a subject ______ Americans have argued for a long time.
A. of which B. with which C. about which D. into which
The company has just launched an advertising campaign to ____ their newly produced bicycles.
A. advocate B. urge C. motivate D. promote
The new research center will be set up was a wasteland 20 year ago.
A．in whatB．whereC．in whichD．there
--How are your business goes wrong?
---But I have done all that is by law.
A. required B. judged C. requested D. desired
—What happened over there?
—They argued________the waiter________the price of the meal.
A．to；for B．against；over C．for；at D．with；about
She will tell us why she feels so strongly that each of us has a role _____ in making the earth a better place to live.
A. to have played B. played C. playing D. to play
