对了,因为在这里是What引导的宾语从句,不是定语从句.Do you have any idea ()?a where is the bookb whose the bag isc whose book is thisd if will he be free知道啊，可是答案B中的whose后跟名词，是不可能加冠词的。应该是前面是句子主要成分，后面是从句，语序是正常语序