He____ English for six years by the time he takes his exams.A．had been studyingB

题干

He____ English for six years by the time he takes his exams.

A．had been studying	B．was studying
C．will have been studying	D．has been studying

上一题下一题 0.65难度单项选择更新时间:2017-07-01 12:03:09

小学学科试题库

初中学科试题库

高中学科试题库