_______ the boy was walking down the street, the UFO landed.

_________ are the days when teachers punished students for minor offenses, being late for school, for example.

I’m sorry; I shouldn’t have been so rude to you. — You _____ something not very nice to me, but that’s OK. [ ]

_______, her hands shook constantly and violently.

A number of children ________ parents had died in the quake were sent to live with families in other cities.