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Professor Smith, along with his assistants, _______ on the project day and night to meet the deadline.

A. work      B. working     C. is working         D. are working

Professor Smith, along with his assistants,____ on the project day and night to meet the deadline.

A. work          B. working         C. is working     D. are working

Professor Smith, along with his assistants, _______ on the project day and night to meet the deadline.

A. work  B. working     C. is working  D. are working?

Professor Smith, along with his assistants,______ on the project day and night to meet the deadline.

A. work           B. working        C. is working  D. are working

Professor Smith ,along with his assistants ,      on the project day and night to meet the deadline .

       A．work                  B．working              C．is working           D．a(chǎn)re working