请展开查看知识点列表
—________
A. B. C. D.
⑴—Let me clean the blackboard.
—All right.
⑵—Who is your friend?
—He is John.
⑶—Let me help you.
—Thanks.
⑷—Who is she?
—She is my sister.
(i/i-e)
(o/o-e)
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