六级词汇笔记单选题词汇的解析8

　　69.The detective and his assistant have begun to ________ the mysterious murder.

　　A.come through

　　B.look into (into 进入中心)

　　C.make over

　　D.see to

　　70.Sadly, the Giant Panda is one of the many species now in danger of ________.

　　A.extinction

　　B.migration 迁徒

　　C.destruction 家世血统

　　D.extraction

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