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(单选题)Where did the two boys go to find treasure one Saturday afte (单选题)The passage suggests that ______. (单选题)Which of the following is not mentioned in the passage? (单选题)We can learn from the passage that Doctor Nelson ______. (单选题)What do the last two paragraphs tell us? (单选题)What do we know from paragraph 3? (单选题)The new regulation requires school to ______. (单选题)The writing is mainly about a new regulation regarding _____ (单选题)What do we know allergies? (单选题)Your immune system acts differently and fights against _____