Mark Twain, ____ his rich life experience, wrote many popular stories.

Pay attention to details when solving difficult problems.——______________.

The volcano erupted for the next two days. Many people were buried alive, __________ was the city.

Of the 9,500 drivers since the beginning of the year, 23% were found lacking road knowledge

It is really important to form an atmosphere among young people values self reliance rather than relying on parents.