Question

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

Answer 1

C

试题分析：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。
点评：主语由as well as, along with, together with, rather than, no less than, but, except, besides, in addition to, like, including等词连接时，其谓语动词的单复数形式通常由前面的词来决定。这题还考查了work相关的短语，做题目要综合考虑。