题目内容

预习梳理

用所给词的适当形式填空

 1.A special pen is used for _______ (quick) taking notes in class.

 2.This special pen was _______(invent) by Liu Jie.

 3.It is often difficult to decide on the ________(invent) of certain ______(invent).

 4.It's hard to tell who _______ (come) up with the new idea first.

答案:

  1.quickly            2.invented    

  3.inventor,inventions      4.came

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