Professor Wang, together with his colleagues, working on the project day and nightto the

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A. are; meet
(答案→)B. is; meet
C. are; satisfied
D. is; satisfied
解析：考察主谓一致和动词。当主语后面有together with, along with ,with ,as well as +名词的时候，后面的谓语动词由主语决定，即professor wang, 所以排除AC。第二空为固定短语meet the deadline意为按期完成，赶上最后的期限。