It remains doubtful whether the project next month will bring profits to the company. A.

问题补充：

It remains doubtful whether the project next month will bring profits to the company.

A. accomplished

B. to be accomplished

C. having accomplished

D. being accomplished

答案：

A. accomplished

(答案→)B. to be accomplished

C. having accomplished

D. being accomplished

解析：考查非谓语动词。根据句意可知这个工程没有完成，故用不定式作定语，选B。