北京故宫是（） A．明、清两代的故宫 B．元、明两代的宫殿 C．宋、元两代的宫殿

   For several years, Americans have enjoyed teleshopping－watching TV and buying things by phone.
Now teleshopping is starting in Europe. In some   1    countries, people can turn on their   2     and shop
for clothes, jewelry, food and many other things.
   Teleshopping is becoming      3   in Sweden. For example, the biggest Swedish company sells varieties
of things on TV in different European countries, and in one year, it   4   $10 million. In France, there're
two teleshopping channels, and the French   5   about $ 20 million a year in buying things through those
channels.
    In Germany, until last year, teleshopping was only possible on one channel for one hour every day.
Then the government allowed more teleshopping. Other channels can    6   for telebusiness, including
the largest American teleshopping company and a 24-hour teleshopping company. German    7   are
hoping these will help them sell more things.
   Some people like teleshopping because it allows them to do their shopping without       8   . With
heavy traffic in cities, going shopping isn't easy. But meanwhile, other Europeans       9   this new way
of buying things. They call teleshopping " 10   on the air". Many Europeans usually worry about the
quality of the things   11   on TV. They think high quality is the most important, and they are not sure
 about the quality of the things   12   .
    The need of high quality means that the European teleshopping companies will have to be   13   the
American companies. They will have to be more careful about the   14   of the things they sell. They
will also have to work harder to sell things that the buyers cannot 15     or see by themselves.