After Jack had sent some e-mails, he working on his project.
A. had started
B. has started
C. started
D. starts
After Jack had sent some e-mails, he working on his project.A. had started B. has started
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解决时间 2021-03-22 20:55
- 提问者网友：遮云壑
- 2021-03-22 17:07
最佳答案
- 五星知识达人网友：洒脱疯子
- 2021-03-22 17:58
A. had started B. has started(答案→)C. started D. starts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。
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- 1楼网友：往事埋风中
- 2021-03-22 18:13
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