19. Rearrange the following sentences so that they read logically. Put

the corresponding letters in a proper sequence in the boxes provided

below. The positions of some sentences have been given.

[A] We generally recognize that future circumstances are somehow caused

or conditioned by present ones.

[B] Besides，we also learn that such patterns of cause and effect are

probabilistic in nature.

[C] Thus, students learn that studying hard produces good grades in

most instances，but not every time.

[D] Humans seem predisposed to undertake this task by using causal and

probabilistic reasoning.

[E] Practically all people，and many other animals as well，exhibit a

desire to predict their future circumstances.

[F] We learn that getting an education will affect how much money we

earn later in life and that swimming beyond the reef may bring an

unhappy encounter with a shark.

[G] That is，the effects occur more often when the causes occur than

when the causes are absent—but not always.

[H] Sharks，on the other hand—whether or not they reason the matter

through—may learn that hanging around the reef often brings a happy

encounter with unhappy swimmers.

  B      A     D
  
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