优题课 - 聚名师,上好课(www.youtike.com)
  首页 / 试题 / 高中英语 / 试题详细
  • 科目:英语
  • 题型:单选题
  • 难度:较难
  • 人气:2033

After Jack had sent some e-mails, heworking on his project.

A.

had started

B.

has started

C.

started

D.

starts

登录免费查看答案和解析

AfterJackhadsentsomeemails,hew