We should pay great attention to safely in schools because of frequent reports about accidents______students got injured or killed while in school.
I met several people there, two of _____were foreigners.
He told me the news_____, believe it or not, he had earned $1 000 in a single day.
Who do you guess _____ to the station to meet her?
After ____ seemed like hours he came out with a bitter smile.
According to the rules, students must not _____ their books during examinations.