问题
选择题
Professor Smith, along with his assistants,______ on the project day and night to meet the deadline.[ ]
A. work
B. have worked
C. is working
D. are working
答案
答案：C
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Professor Smith, along with his assistants,______ on the project day and night to meet the deadline.[ ]
A. work
B. have worked
C. is working
D. are working
答案：C