Question 17 is based on the passage you have just heard.

Passage One

听力原文

    Single-sex education can have enormous benefits for female students. Numerous studies have shown that women who attend single-sex schools tend to have stronger self-confidence, better study habits and more ambitious career goals than women who attend coeducational schools. (16) Girls who graduate from single-sex schools are three times more likely to become engineers than those who attend coeducational schools. The reason is that all-girls schools encourage women to enter fields traditionally dominated by men, such as science, technology and engineering. In coeducational schools, girls are often expected to succeed only in humanities or the arts. (17) Research has also shown that in coeducational settings, teachers are more likely to praise and give in-depth responses to boys’ comments in class. In contrast, they might only respond to a girl’s comments with a nod. They are also more likely to encourage boys to work through problems on their own, while they tend to step in and help girls who struggle with a problem. In an all-girls setting, girls are more likely to speak up frequently and make significant contributions to class than in a coeducational setting. Girls studying in a single-sex setting also earn higher scores on their College Board and advanced placement exams than girls who study in coeducational settings. (18) All girls schools tend to be smaller than coeducational schools, which means teachers will be able to tailor the materials to girl students’ personal learning styles and interest.

17. What do teachers tend to do in coeducational settings?

解析：D。根据录音中间部分，研究还表明，在男女同校的情况下，老师更有可能在课堂上表扬男生，并对男生的发言给予有深度的回应。D项的boy’s comments为原词复现，positively是录音中praise and give in-depth responses的近义替换，故正确答案为D。录音中提到，老师对女生的发言可能只是会点头回应而已，而A项说老师倾向于表扬喜欢发言的女生，与录音内容相悖，故排除。录音中说而且他们还更倾向于鼓励男生（boys）自己解决一些问题，而往往会主动向遇到困难的女生提供帮助，B项与录音内容相悖，故排除。录音中并未提及男生和女生应该多在一起学习，故C项排除。