can you tell me ______ this is?A.what; B.if; C.whose; D.who请说明原因；答案给的是c;

Can you tell me ____ ____ ____ ____the maths problem? Excuse me ,can you tell me how ____ holiday Hotel Can you tell me how l can get to the hospital?(改同义句)Can you tell me ____ the hospital _____?Can you showw me ____ ____ to the hospital?Can you tell me how ____ ____ the hospital? Can you tell me when ____(come) tonight? can you tell me where ____(buy) the hair clips. Can you tell me something ____ your countey? Can you tell me your ____(exactly) address Can you tell me where we will go tomorrow?同义句Can you tell me ____ ____ go tomorrow? Can you tell me which book I should buy?Can you tell me which book ____ ____? Can you tell me how I can get there?Can you tell me ___ ___ ____ there? Can you tell me the way to the station?写同义句Can you tell me____ ____ ____ ____the station? Can you tell you me where the library is?同义句：Can you tell you me ____ ____ ____ the library? 同义句转换Can you tell me what I should do now?Can you tell me ____　　_____　_____ now? can you tell me what I shouid do?(改为简单句）can you tell me ____ _____ _____? can you tell me how i can get to the house?同意句：can you tell me how ____ ____ ____ the house? Can you tell me how I make a cake （该为同义句） Can you tell me ____ ____ ____ a cake? Can you tell me how I can solve the problem quickly(改为同义句）Can you tell me ____ ____ _____the problem quickly Can you tell me how I can work out the problem?句型转换.Can you tell me ____ ____ work out the problem.