每课包含四个部分：Testing Guide(要点指南)、Error Examples(改锚举例)、Review Test(课后测试)、Answer Keys(答案解析)，内容涉及英语语法和修辞等。
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Answer keys to the exercises 练习答案
Grammar Exercises and Answer Keys 语法练习及答案
transcripts and answer keys 录音文本及参考答案
Scripts & Answer Keys 提供听力文本及练习答案
Answer keys and teaching Suggestions support parents as they help their children.
答键和教学建议表示支持，因为他们的父母帮助他们的孩子。
Listen to the recording, and then answer this question: Where were Karen's car keys?
听录音，然后回答问题：卡伦的车钥匙在哪儿？
The answer – in part – seems to be that the patterns of pitches in major keys mirror those of excited speech, whereas minor keys parallel subdued speech.
此问题的答案在某种程度上似乎在于由大音阶定调的音乐模式反映了那些能使人振奋的语言，然而小音阶的音调却与受压抑的语言相类似。
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