用Whom,how,why,who,which造特殊疑问句做宾语从句的句子,用if和whether造一般疑问句做宾语从句的句子.谢谢!

回答：1.I wonder whom he is talking to on the phone.2.Please tell me how you worked out the math problem.3.You must explain to us why you have changed your mind.4.Do you know who will be our English t...