13. The Imperial Palace is the architectural masterpiece in ancient time.
故宫是古代建筑的杰作。
还能这样说：
The Imperial Palace is a masterpiece among the ancient architectures.
The Imperial Palace is a magnificent work among the ancient buildings.
14. The Great Wall demonstrates the brilliance of China's ancient culture.
长城显示了中国古代的灿烂文化。
还能这样说：
The Great Wall shows the splendid ancient Chinese culture.
The Great Wall symbolizes the brilliant ancient Chinese culture.
15. The places of historic interest and scenic beauty are the first choice for the travelers.
名胜古迹和自然景观是旅游者的首选。
还能这样说：
The places of historic interest and scenic beauty are the top priority for the people who want to go travelling.
The places of historic interest and scenic beauty are the tourists favorite choice.
谚语：
There is small choice in rotten apples.
一筐烂苹果（没有什么好选择的）。
16. The Gardens of Suzhou was built in Spring-Autumn period.
苏州园林建造于春秋时期。
还能这样说：
The Gardens of Suzhou was founded during the Spring-Autumn period.
The Gardens of Suzhou can be traced back to the Spring-Autumn period.
17. The tickets of the places of historic interest and scenic beauty are usually expensive.
名胜古迹和自然景观的门票通常很贵。
还能这样说：
Generally speaking, it is expensive to travel the places of historic interest and scenic beauty.
The fares of the places of historic interest and scenic beauty are very high.