1．As in any business，we experienced a lot of challenges (挑战)．
2．We could foresee (预见) that we would die if we could not reach land very soon.
3．We should try to expose (暴露) our children to much interesting stories.
4．The police suspected(怀疑)the young man of taking away the important paper just now.
5．The government took measures to prevent our city from being polluted(污染)more seriously.
6．I don't know why he refused to attend the meeting that day.
7．Once more the soldiers attacked and once more they were defeated．
8．Don't be too severe on her.After all，she is only four.
