whwn the police arrived the aline left the ground 为什么用when而不

whwn the police arrived the aline left the ground 为什么用when而不 _ the police arrived, the alien left the ground A:before,B: Before the police arrived,the alien left the shop ,句中能用when或 Before the police arrived,the alien left the shop.(为什么选择arri The thief ___ the bank when the police arrived. When the police arrived,the crowd scattered _____all directi When the police arrived,the man for 10 minutes. Before the police arrived,the alien left the shop and then v the leader had a( ) left when i arrived there When the police arrived,the man was requested ________ the s When the police arrived at the scene,the victim was already_ when he arrived there ,he found the man lying on the ground(