[听力原文]
W: I’d like to see the an exhibition tomorrow, Can you tell me what time it’s open
M: Yes. it’s open from 8 until 6, but there’s an hour lunch break.

For how many hours is the art exhibition open（）

A．PSAs can automatically monitor life support systems, snapping photos, and taking overmonitoring tasks from failed sensors.
B．They are capable of videoconferencing so that they offer a virtual presence of ground crows and scientists.
C．They can go where no man has gone since the vehicles were first assembled.
D．All of the above mentioned.

A．dying
B．fatal
C．death
D．deadly