Questions 8 to 11 are based on the conversation you have just heard.

A．It is stable.
B．It is durable.
C．It is inexpensive.
D．It is Sophisticated-

A．Land a space vehicle on the moon in 2019.
B．Design a new generation of mobile phones.
C．Set up a mobile phone network on the moon.
D．Gather data from the noon with a tiny device.