【单选题】 John is collaborating with Mary in writing an article.
A.cooperating
B.competing
C.combining
D.arguing
网考网参考答案:A
网考网解析:
collaborate:合作;勾结。cooperate:合作。 She has agreed to cooperate with the police in the investigation.她同意在调查中跟警察台作。compete:比赛。combine:合并。argue:争论。
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