Questions 14-17 are based on the following conversation. You now have 20 seconds to read the questions 14-17. What will Mr. Bush probably buy

A．97 to 99 degrees.
B．79 to 81 degrees.
C．79 to 99 degrees.
D．71 to 79 degrees.

A．All senses have their limitations.
B．Insects are more sensitive to colour than man.
C．Man has not fully utilized all his senses.
D．Man is not as good as animals in learning about the environment.

A．It is farming that gives human beings enough leisure time for sporting activities.
B．Farming is very important in human civilization because it saves human beings from risks and uncertainties of hunting for survival.
C．It is hunting that provides human beings with much simpler ways of obtaining meaty meals.
D．Sporting activities satisfy the desire of modern man to exercise hunting skills which his forefathers developed for survival.