Although he is ____ boy ,he knows a lot about the universe.A. a eight-year-oldB. an eight-years-oldC. an eight-year-old
The strategies that Tom came up with worked out fine.
I wish I could go to Mars one day.
My father was reading newspapers ____ my mother was cooking at this time yesterday evening.
--- How soon will the boss come back? ---__________ about three days.
--- What do you think of the film Avatar? --- It’s fantastic. The only pity is that I _______ the beginning of it.