Has your grandfather ever worked as a teacher?Yes.He______Chinese in a primary shool when he was
问题描述：
Has your grandfather ever worked as a teacher?Yes.He______Chinese in a primary shool when he was
young.
A.has taugut B.teaches C.used to teach D.is teaching
急
答
C 这是过去时态的句子 只有 C是过去式
used to do sth 过去常常做某事
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