Tom, clean up the broken glass _________ someone walks on it.
A new __________to teaching English, is being used here, and it has proven to be very helpful to the students.
It was at the very beginning _______ Mr. Fox made the decision _____ we should send more fire-fighters there.
Last Sunday I went to visit the History Museum where I saw a pot _________ about 1,000 years before.
The reason why this kind of machine is popular with users is that it will work in ______ temperature.
--- Haven’t seen you for ages! Where have you been, anywhere ?--- I _______ to New York City. I just got back.