I can ______ be a teacher. I’m not a very patient person.               

He began to take English _______ only when he left school.

Tonny’s parents thought he was at school, but ______ he was in an Internet bar.

No one expected house prices to fall, but _____ that's exactly what happened.

By the time the fire-fighters arrived, the fire had been put＿＿＿by the teachers and the students.