1．— 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
2．---- Do you know England?
----I’ve heard that he wants to go there for further study.
A. why he will go to B. why will he go to
C. he why will go to D. he will why go to
