Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
At what time does this conversation take place

A．Indians like hot weather.
B．Indians did not like planting trees.
C．Extreme heat killed many people.
D．There are frequent floods and, storms.

A．400 years old.
B．600-700 years old.
C．1000 years old.
D．5500 years ol