选词填空）
请根据所给句子的内容，从下面方框中选出适当的单词，并用其正确的形式填在答题卷相应的横线上。每空一次，每词限用一次。

nine      invent    clear         great       Canada operate    he       worry        check       miss

He isn’t Chinese.He is __________.
The Smiths live on the              floor of the white building.
Li Na is one of the __________ tennis players in the world.
Please wait a moment. Mr Li is doing a(n) ___________ at the moment.
These __________  have brought the old lots of happiness.
Mrs Zhao is _________ about her weight all the time.
He is old enough to look after __________.
He speaks French as _________as a person born in France.
Those people are looking for a _________ boy here and there.
After final exam,teacher are busy____________the examination papers.