---Look at those shoes, Mike! ---Wow! They look very cool, but I wonder ________.A.how much are theyB.how much do they costC.if my parents will buy them for meD.that my parents will buy them for me
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C解析if既可以引导宾语从句又可以引导状语从句。if充当宾语从句的连接词时，相当于whether，词义为“是否”，遵循宾语从句的时态规则，可根据语境选择任何时态；