摘要：你想把你的朋友介绍给妈妈.你应该说: . A.Mum, this is Jim. B.Jim,this is mum. C.Mum,Jim is here. D.Mum,where is Jim?
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你想把你的朋友介绍给妈妈，你应说：
- A.Mum, this is Jim
- B.Jim, this is mum
- C.Mum, Jim is here
- D.Mum, where is Jim