Completing all the homework by the dinner, John felt very tired. He __________all day long.A.was stu

题目简介

Completing all the homework by the dinner, John felt very tired. He __________all day long.A.was stu

题目详情


Completing all the homework by the dinner, John felt very tired. He __________all day long.
A.was studyingB.studiesC.has studiedD.had been studying
题型:单选题难度:偏易来源:不详

答案

D

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