题目内容

Professor Smith, along with his assistants, _____ on the project day and night to meet the deadline.
A．workB．workingC．is workingD．are working
C
考查时态及主谓一致题。主语是单数时，尽管后面跟有 but ,except, besides, with ，as well as ，together with， along with，like 等引导的介词短语时 ，谓语动词与前面的主语一致。根据后面的day and night可知，需用现在进行时，故选C。
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