He is standing _at__the__bus__station_.（画线部分提问）
Where is he standing?
他正站在哪里?

1. the  boys  are  playing  _basketball_____    now

2. the  boys  are  _playing__basketball___   now

  3.   the  teacher  is  talking  with  _my__mother___

  4.she  is  waiting  for  _her____child______

1、What are the boys playing now?2、What are the boys doing now?3、Whom is the teacher talking with?4、Whom is she waiting for?whom是什么？whom是whom的宾格，在句中做介词with \ for的宾语。