单项选择题A．Professor and student.B．Shop assistant and customer.C．Librarian and reader.D．Two friends.

单项选择题A．She married twice.B．She does not like baby.C．She likes to do housework.D．She envies her sister.

单项选择题A．It has become a clumsy giant.B．The city has suffered from lung-time famine.C．There was an epidemic disease that time.D．It has been set on fire.

单项选择题A．ballet.B．Swimming.C．Nursing.D．Teaching

单项选择题A．For hunting.B．For protecting himself.C．For stimulation.D．For protecting the country.

单项选择题A．It’s near Mexico City.B．It’s in Guatemala.C．It’s stretched from the plains of central Mexico to the mountains of Guatemala.D．It’s in America.

单项选择题A．Same height.B．Same friends.C．Same number of children.D．Same university.

单项选择题A．Commenting on a picture.B．Looking at some paintC．Painting a picture.D．Comparing two paintings.

单项选择题Which of the following conclusions is best supported by the second paragraph

单项选择题In order to enable the intelligent robot to deal with an unexpected situation, the computers in it must do the following things except ______ .