He worked late last night, ______, early this morning.
Action must be taken to prevent that factory from ______ heavy smoke into the air.
— Can you see what is written on that board?— Yes. It _______ “CAUTION: WET FLOOR”.
Could you tell us ______ happens when one student in class expresses a personal opinion _______ maybe upsets other students?
. Let’s take _____ ten-minute break and have _______ drink of water.
He _______ us that everything would go according to plan, but it turned out a failure.