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题目
题型:不详难度:来源:
After Jack had sent some e-mails, he _______ working on his project.
A.had started B.has started
C.started D.starts

答案
C
解析
考查动词时态。根据前半句的谓语动词用了过去完成时,可知后半句用一般过去时,这样才能符合“过去的过去”这一条件。句意:Jack发了几份电子邮件之后,他才开始研究他的项目。
核心考点
试题【After Jack had sent some e-mails, he _______ working on his project.A.had starte】;主要考察你对一般现在时等知识点的理解。[详细]
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