—why, James, you look so tired! ---Well, I _____the house and I must finish the work tomorrow.
-What a beautiful river and breathtaking mountains!-Yeah. They make me think I___on an alien planet.
It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.
-I need to put a cross on the map to show ____ that famous hotel is.-____? Mary’s done it already.
Measures must be taken to prevent pollution ____ happily.
Despite being taken from very different sources, the results are remarkably ____.