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题型:单选题 题类:常考题 难易度:普通

仁爱科普版九年级上Unit 4 Amazing ScienceTopic 2 I’m excited about the things that will be discovered in the f

The new dictionaries are very useful. They _______ well and _______ already.

A、sell; have been sold out B、sold; had sold out C、sell; sell out D、are sold; have been sold out
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