Professor Smith, along with his assistants, day and night to meet the deadline．
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Professor Smith, along with his assistants, ________(研究这个项目)day and night to meet the deadline．(work)
试题答案
答案：is working on the project
解析：考查主谓一致和动词时态。本句的主语是Professor Smith，再由day and night可知要用进行时。 |