Complete the summary below.Choose ONE WORD ONLY from the passage for each answer.Write your answers in boxes 21-26 on your answer sheet.In 1980s, research studies were designed to test the subject called Theory of Mind that if children have the ability to represent the reality. First experiments were carried out on this subject on a boy. And questions had been made on where the boy can find the location of the 1. But it was accused that it had excessive 2. So second modified experiment was conducted involving two dolls, and most children passed the test at the age of 3. Then Lewis and Dunn researched 4children in a certain place, and found children who have more interaction such as more conversation with 5actually have better performance in the test, and peer interaction is 6because of consisting pretending elements.
【答案解析】解析：根据题干关键信息“peer interaction”定位到原文F段最后一句话“…who argues that peer interaction is more likely to contain pretend play and that it is likely to be more chal lenging because other children，unlike adults，do not make large adaptations to the commu nicative needs of other children．”因此，本题的答案为challenging。