【正确答案】正确答案：Community attitudes toward the language being learned can also have a profound impact on SLA. When the community has a broadly negative view of the target language and its speakers, or a negative view of its relation to them, learning will be typically much more difficult. A widely-cited example is the difficulty faced by Navajo children in learning English as a second language.(1 point) Other common social factors include the attitude of parents toward language study, and the nature of group dynamics in the language classroom. Additionally, early attitudes may strengthen motivation and facility with language in general, particularly with early exposure to the language.(1 point)

【答案解析】解析：考查影响二语习得的外部因素。影响二语习得的因素可分为内因和外因两种。内因主要是学习者自身的因素，包括年龄(age)、语言能力(aptitude)、动机(motivation)、性格(personality)、认知类型(cognitive style)、学习策略(learning strategies)等等。外因主要是指环境因素，包括母语(native language)、输入(language input)、社会和情境因素(social and situational factors)等等。