同义句转换 You must look to the right and the left You must look

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 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? 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 when you go ( ) the road YOU must look left and right f_ .Then you can cross the road you must look to the _________first and then the left A.left Before you__the street,you must look to the left and then ri We must look to the left and then right before ( ) the stree You must look right before you cross the road.