What does the word thisrefer to in the sentence “There is a story which well illustrates this”?
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Why was the medical student surprised?
Does the word illustratemean the same thing in “There is a story which well illustratesthis”and “This volume on the subject, however, happened to be so well illustrated …”?
What, according to the writer, must the owner of a bookshop do and be like?
看到敌机飞近,他们飞奔开去,寻找可以躲避炸弹的掩蔽处。