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？
Answer: There is actually only one set of media keys available at any time.
答：事实上在任何时候只有一套媒体播放键被使用。
Answer: There is actually only one set of media keys available at any time.
答：事实上在任何时候只有一套媒体播放键被使用。
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