Without enough food, many birds didn’t ________ the winter.
.To our surprise, that top student in our class failed _________a scholarship.
.The building burnt down in a big fire. _________was the base on which it stood.
.If a computer crashes, you will lose the file you _________unless you save it regularly.
.The driver _________, according to the newspaper, to have been killed in the traffic accident.
.The custom of giving gifts at Christmas can be traced back to the Wise Men _________gifts to the baby Jesus.