1. 用方框内所给词的适当形式填空。

Canada   realise   operate   invent  wound

1. （1） "Do you that this is the third time you've forgotten?" she said angrily.
3. （2） Her mother is Chinese and her father is .
5. （3） The birds finally died and fell to the ground.
7. （4） The of printing was a milestone(里程碑) in human history.
9. （5） The whole on the sick boy lasts over 4 hours.