John,hurry up!You are-----over the phone

很简单,你可以把每个选项的中文意思都套进去看看是否合适.
A you are asked over the phone——John还没有接电话,显然不会在电话谈话中被问
B you are hoped over the phone——这个就更简单了,被电话那头的人希望?句意不通.
C you are answered over the phone——John在电话中得到回答,或者译作那边的人接了John的电话,两种意思也都不对.
D you are wanted over the phone——wanted有“被征求的”之意.这句话的意思是,有人打电话找你.主动句式可为,sb wants to talk to you over the phone.另：这是英语中的一种很常见的习惯用法,你见得多了,积累了语感,自然就知道怎么用了.