次の英文を読んで、各問いに答えなさい。

  Mind can be observed and known. But you can know directly only your own mind, and not another's. You may look into my face and guess the meaning of the smile or frown, and so read something of the mind's activity. （　1　） that is not always right. You may learn to recognize my features, know my voice, respond to the clasp of my hand; but the mind, the consciousness, which feels my joys and sorrows, You can never know completely.

  Therefore, it follows that only you can ever know you and only I can ever know I directly. Between your consciousness and mine, there exists a wide gap that cannot be bridged. We may work together, live together, come to love or hate each other. But our mind can never be understood entirely by other people. We must live our own lives, think our own thoughts, and arrive at our own destiny.

  Then, what is mind? What is the thing that we call consciousness? The only way to know what mind is, is to look into our own consciousness and observe what is happening there. In the language of the psychologist, we must ※１introspect. Because one can never come to understand the nature of mind and its laws of working by listening to lectures or reading text books alone. There is no psychology in the text, but only in your living, flowing stream of thought and mine. Indeed, the lecture and the book may tell us what to look for when we introspect, and how to understand what we find. But the descriptions about our minds must be confirmed by our own observation and experience.

The Mind and Its Education, by George Herbert Betts （一部改変）

※1　introspect…自省する

（1）Fill in the blank （　1　） with an appropriate word.

• AInstead
• BSince
• CFor
• DBesides
• EBut

（2） Which of the following best describes the author's thinking about knowing other people's mind?

• AWe can know other people's mind directly.
• BWe can know other people's mind by coming to love each other.
• CWe can't know other people's mind at all because we don't strive to understand it.
• DWe can guess other people's mind, but we can't know it completely.
• EWe can't guess other people's mind by working together, but we can by coming to love each other.

（3）According to the author, what is the best way to know what mind is?

• AListening to the lectures of psychology
• BLooking into our own consciousness and observing what is happening there
• CLiving with others and think what he or she sees
• DBelieving the descriptions of books about psychology
• EThere is no way to know what mind is.