--- How ________ do you attend the evening classes? --- _______, three times per week.
During the Olympic Games,journalists from all over the world came to __________ the events.
She keeps a supply of candles in the house in case of power _________.
—That city __________ the widespread use of motorcycles.—So it does,as this will help reduce transport problems.
—Tom was absent today,wasn’t he?—No,he wasn’t.He was just late,because he ________ his bus.
I had _________ entered the classroom when I noticed the headmaster was sitting at the back.