通读下面的短文，掌握其大意。然后，从每小题的四个选项中选出可填入相应空白处的最佳选项。
One of the most remarkable things about the human mind is our ability to imagine the future. In our minds we can see what has not yet happened. For example, while we are looking forward to 21 a new place or country, we 22 what it will be like. We predict（预料）the way people will eat, dress and act. Of course, we do not always predict things 23 . Things are often very different from the way we 24 them to be.
One of the most 25 dreams in history is the dream of the German scientist, Kekule, who had been 26 to work out a very difficult problem in Physics. He had 27 and analyzed（分析）the problem from every angle（角度）for days, but there seemed to be no way of 28 out he answer. Then one might go to bed and dream. When he 29 up, he realized that he knew the answer. He had solved the problem in his 30 .
The hypnotist（催眠者）sat in the chair opposite him and spoke 31 : I want you to concentrate on my voice. Think about 32 . You know nothing but my voice. And as you pay attention to my voice, your 33 will get heavier. Soon you'll be asleep.
You will hear my voice and understand my words, but your body will be asleep, because your eyes are too heavy. You are 34 asleep, and when you wake up you will remember nothing.
You will forget everything. Now I am going to 35 slowly from one to five. One, two, three, four, five.
____
A.dream
B.class
C.memory
D.book