单选题 John is collaborating with Mary in writing an article.
【正确答案】 A
【答案解析】[解析] 画线词的原形collaborate为动词,意为“合作,协作”。A项的原形cooperate意为“合作”;例:To my surprise, he refused to cooperate with us.令我吃惊的是,他不肯与我们合作。B项的原形compete意为“竞赛,比赛”;例:He at last got a chance to compete in the Olympics.他终于获得了参加奥运会比赛的机会。C项的原形combine意为“结合”;例:He tried to combine theory with practice.他试着把理论和实际相结合。D项的原形argue意为“辩论,证明,说服”;例:You can"t argue them into it.你不可能说服他们这么做。故本题选A。