Internet is an important _____ for people to get the latest news.

I tried to persuade him to give up the foolish idea, but in ________, and now he begins to regret.

The dam is 3800 ___. It is a 980 ___ dam at the base.

A sense of __________ is the basic requirement for people working in the service industry, such as education and health care.

Now an increasing number of middle school students go abroad for further study at their own ________, trying hard to realize their dreams.