I think I was at school, ______I was staying with a friend during the vacation when I heard the news.
After the long journey, the three of them went back home, ______.
—Is everyone here?—Not yet… Look, there ______ the rest of our guests.
—How many students will attend James’ course?—I suppose there will be not more than ten, ______, for it is too difficult.
Though having lived abroad for years, many Chinese still _____ the traditional customs.
Mistakes don’t just happen; they occur for a reason. Find out the reason, and then making the mistake becomes _______.