A driver should __ the road when .A concentrate on; drive B. concentrate in; driving C. concentrate to; drove D. concentrate on; driving
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.