— How about buying an iPhone 4s for your mother’s birthday?
— Oh, maybe it’s too expensive, Dad. Do you know _______?
A.how much does it cost | B.how much it costs |
C.how much it cost | D.how much did it cost |
— How about buying an iPhone 4s for your mother’s birthday?
— Oh, maybe it’s too expensive, Dad. Do you know _______?
A.how much does it cost | B.how much it costs |
C.how much it cost | D.how much did it cost |