I saw Tom _____ into the classroom without _____.
Beijing government puts more than 700 million yuan to increase its green space this year,____________ doubles the money provided last year.
I can guess you___________ your sweater inside out.
. It is only when you nearly lose someone ____________ you fully realize how much you value him.
--I'm going downtown. --Come on.
--Shall Mary come and play computer games? --No,__________ she has finished her homework.