A．Because it looks more attractive at night than in the daytime.
B．Because all the buildings there have lights on all night.
C．Because the lights on the major buildings are more colorful than those in any other cities in the world.
D．Because with the brightly-lit buildings and palaces the city is extremely beautiful at night.

A．Sending pictures through E-mail is too expensive.
B．The photograph was not taken at the Modem Museum.
C．They already sent Linda a photograph of their vacation.
D．The photograph is not good enough to send.