1．To avoid ____________(混淆)，the teams wore different colors.
2．The Chinese ____________(文明)is one of the oldest in the world.
3．The professor gave us a lively ____________(讲座)last night.
4. The ____________(遗迹)of the castle can still be seen on the hill.
5．London is still the ____________(文化的)capital of the country.
6．Don’t worry.I’m sure your children will ____________(渐渐地)learn to understand you.
7．Gibbons failed to see the ____________(商业的)value of his discovery.
