This kind of music ____ fifty years ago is still popular today
The fires burned for three days, ________ a total of 25,000 buildings.
Tom took a taxi to the airport, only ________ his plane high up in the sky.
Li Na is a Chinese tennis player, who is said ________ the world championship last year.
If he takes up this job, he will have no choice but ________ a much greater challenge.
New technologies have made ________ easier to enjoy life than ever before.