You must notice ________ the emergency exit is when you enter the building.
A long time _________ a person, which is really a truth.
Mr. Mike doesn’t understand ________ made his wife so upset this morning.
-How much shall I pay for the phone call? -You __________. This is free of charge.
.Mike didn’t notice Alice entering his room. He __________ a phone call.
The policeman _______ the facts again and again, but couldn’t piece them together.