中考复习名语性从句专项练习单项选择1 How about buying an iPhone 4s for your mothers birthday? Oh, maybe its too expensive, Dad. Do you know _?A. how much does it costB. how much it costsC. how much it costD. how much did it cost2- Do you know England? -Ive 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 to3-Can you tell me _?-Of course. J