Have you heard of it ? Firefighters rushed into a burning house, three of them unfortunately       in and         their lives.

With time _______ by, he began making films.

All of the things there are inexpensive, with prices ________ from about $1 to $10.

With so many forms _______, many students feel at a loss before the 2010 college entrance exam.

--- Why do you look so upset?--- ________, I had to take over his work.