In order to meet the deadline, Professor Smith along with his assistantsthe project day an

发布时间：2020-08-17 02:52:36

In order to meet the deadline, Professor Smith along with his assistants     the project day and night.
A. work on
B. works at
C. is working on
D. are working on

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A. work on
B. works at
(答案→)C. is working on
D. are working on
解析：考查词组和主谓一致。A. work on从事，忙于，B. works at致力于，因为主语由along with,连接时，其谓语动词的单复数形式通常由前面的词来决定。就是Professor Smith故用单数谓语，在BC里面选择，句意：为了如期完成，斯密斯教授和他的助手日夜忙着这个项目。答案为C项。
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