2 . It is ____________thought to be a plant of Africa, but no one knows exactly the ____________ of this plant, because we don’t have any ____________ material about it.(origin)

3 . (2017·北京改编) For the machine, this quality is not in-born, nor is it something introduced by humans; it is a logical consequence of the simple fact that the machine cannot achieve its ___________ (origin) purpose if it is dead.

4 . After his death the house was back to its ____________ (origin) owner.

5 . This is not a copy but an ______（最初的）painting by Picasso.

6 . They accepted their advice and replaced the o_________   plan with a more effective and practical one.

7 . The __________(最初的) requirement is that you need perfect DNA which gives information for how cells are to grow.

8 . Our ________ (原来的) plan was to see a film at the cinema that afternoon. (根据汉语提示单词拼写)

9 . I think you should go back to your ________ (原先的，最初的) plan. （根据汉语提示单词拼写）

10 . Sadly, the library has moved from its ________(起初的) place into another building. (根据汉语提示单词拼写）