1.The opening ceremony was put off because of the rain.
2.He is likely to have left his key to the office in the library.
3.It has been / is proved that parents' words and behaviors / what the parents say and do have
a deep/great influence on their children.
4.He often goes fishing in the park on/at weekends,turning a blind eye to the "No Fishing" sign.
5.Experts suggest that elderly people should drink a little wine each day,because it can stimulate
their appetite and (help) digestion,which is good for their health.