“Drive-ins” have large parking lots _______ customers are served in their carsby waitresses．

The parents try to do everything for their son-That is________they are mistaken[ ]

It is difficult for us to ______ our conversation with all this noise around us.

Was it in the beautiful park _________was located by the sea ______you first met your new English teacher?

You have no idea how she finished the relay race______ so much.