It’s already 10 o’clock, I wonder how it ____ that she was two hours late on such a short trip.
23. —You started all the trouble. —But I didn’t to.
22. Of the seven days in a week, Saturday is said to be the most popular______for a wedding in some countries.
21. Every minute should he made full use of_______our lessons. ?
20. His sister left home in 1998, and______since.
19. He has made a lot of films, but___________good ones..