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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1741

—Linda, I called you this morning, but nobody answered the phone.
—I'm sorry. I      a picnic with my family then.

A.have B.had C.am having D.was having
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—Linda,Icalledyouthismorning,b