The question that puzzles them is ___they can finish the work on time.
—Did you enjoy yourself on the beach ? — .
20.This is the small house less than 15 square meters,under _____ roof lives a large family of three generations.
17. They can't be working now. It's time they ________ the office.
30.---Can I watch the World Cup games tonight? ---_____.I know you have a lot of homework to do tonight.
29.There have been several new events _____ to the program for the 2008 Beijing Olympic Games.