单项选择题

What does "smart" lighting system mean

A．It can be turned off when you don't speak, and be turned on when you speak.
B．It can adjust to the internal clock of human beings.
C．It can develop itself with time goes by.
D．It can respond to human beings' every demand.

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单项选择题

With regard to marriage in Britain, present day girls differ from former time girls in______.

A．the right to marry
B．more parental support
C．choosing husbands
D．social position

单项选择题

Which of the following measures is NOT encouraged from the human health perspective

A．Offer plenty of natural light through windows and skylights.
B．Install bright blue LEDs near computer screens.
C．Offer plenty of electric lights in the room and close the wind to avoid bacteria.
D．Install "smart" lighting system.