Tom, clean up the broken glass _________ someone walks on it.
All teachers received warmest congratulations on Teachers’ Day. They felt ________.
A group of Chinese guests, who are the first ________ from the new agreement on tourism between China and Switzerland, were given a warm welcome in Geneva(日内瓦) last Saturday.
House prices vary from place to place and are usually high _____ there are famous schools.
______seems to be no possibility that the student majoring in liberal-arts can win the first prize in the100-meter race.
My colleagues and I have completely different ideas about when to ________ to the next item on the agenda.