The manager along with his workers day and night to complete the project.A. have workedB

问题补充：

The manager along with his workers day and night to complete the project.

A. have worked

B. work

C. is working

D. are working

答案：

A. have worked

B. work

(答案→)C. is working

D. are working

解析：考查主谓一致。along with连接两个主语，从句的谓语动词与前一个主语保持一致，选C。