When the light is ____,you must wait at the crossing.A、green B、red C、yellow

we must ()when the light is yellowAgoBcrossCwait Wait ( ) ( ) ( ) ( ) when the light is red. when the traffic light is red ______ ( not cross ) the road when the light is red 87 ___(cross) the road when the light is green go a_______ the street when the light is green The drivers can turn right when the light is The box is so light that the boy can carry it.The box is light __ __ the boy __ carry.改为同义句 celebrate .cold holiday .after .special .tradition .light .popularThe Christmas __is a__time when family and friends join together to __.There are many Christmas __ .One of the most __is the Christmas tree which is an evergreen tree .It is decorated You must stop when the light is red 改为祈使句 Wait for your turn when the light is wait for your turn when the light is Wait for your turn when the light is red. What can she do when the light is green? Turn off the light __ you leave.A afterB beforeC untilD when请写出原因 The bus driver stopped the bus immediately when the light is red.保持原句意The bus driver stopped the bus（）（）when the light is red When there is a green light,cars may go on.When there is a red light,cars must (s ).They must wait(u ) the red light changestogreen the light is