—How long _______it _______ you to work out such a difficult problem? —About thirty minutes. A. did… take B. does… take C. did…cost
—Could you tell me how cakes? —Sorry,I don’t know.
We have to________our sports meeting because of the heavy rain.
My brother________play basketball.But now he likes playing baseball.
Tom,your room is too diay.You must________.
They arrived at the finishing line________the same time.We didn’t know who the winner was.