Earth is believed______ by an object the size of Mars at some point in the distant past before its surfacecooled

It is very hot here. Would you mind ________ the window

22—Can we meet at 3 o’clock tomorrow afternoon?— That doesn’t suit meI’m afraid I _____________

It is when the plane ______ that you’d better find out at the booking office

_____ swim in the river — oh, no. Our teacher told us ____ here. It’sdangerous.