填空题 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.