15（）

单项选择题According to the passage, which of the following is NOT true（）

A．Women"s umbrellas are made in various kinds of colors.
B．The inventor of the umbrella is unknown.
C．Once ordinary people had no right to use umbrellas.
D．Umbrellas were popular and cheap in ancient times.

单项选择题What s the problem with credit cards mentioned in Paragraph Two（）

A．They may be very poisonous.
B．They may carry harmful insects.
C．They may cause financial troubles.
D．They may get lost easily.