You must look left and right when you go ( ) the road

You must look left and right when you go ( ) the road Before you c------ the road, you must look left and right Before you c____ the road,you must look left and right YOU must look left and right f_ .Then you can cross the road ：1.We must look left and right when we ____(across) the road 同义句转换 You must look to the right and the left You must look you must look the right first and then the left 可以改为you must You must look right before you cross the road. look left and right before you cross the road,____you may be You should look left and right when you gou___theroad. we must look to the left and right before you cross the stre you must look ( )the left and right .应该填to?at?