At the crossing,when the light is red,we must_____快回答!

At the crossing,when the light is red,we must_____快回答! 英语选择【六年级】Look!The traffic light is red.We must_____(stop)and when the light is red When the light is ____,you must wait at the crossing.A、green when the traffic light is red Wait ( ) ( ) ( ) ( ) when the light is red. The light is red.We should_______(wait) we shouldn't cross the street when the light _____ red .是用is 改错：We must not to cross the road when the light is red. We must not run ( ) the road when the traffic light is red.括 when the traffic light turns red we-----cross the road the light is red，【】