Mary is waiting ( ) the school gate.请问填什么介词.

Mary is waiting ( ) the school gate.请问填什么介词. Hi, Mike, Mary wants to _______ with you and she is waiting at her office. They are waiting for Mary 用who对Mary提问. They are waiting for mary.用who对mary提问 How is Mary How is Mary How is Mary How is Mary How is Mary Heart is waiting love is waiting 歌词 waiting is long poison MARY IS HAPPY MARY IS HAPPY怎么样 英语翻译Mary is ------- ------- ------- -------. What is Mary like? Kate is Mary's Her name is Mary.用Mary提问 Mary is my friend.对Mary提问 whom is he waiting for还是who is he waiting The waiting is life initial He is waiting( )the bus stop and waiting( )the bus She is waiting (at) the airport为什么不用waiting for