6，where are your pencils？你的铅笔在哪（复数）？
my pencils are in my pencil case.我的铅笔在铅笔盒里.
7，put your pencil case in the bag. 把你的铅笔盒放书包里.
否定句： don't put your pencil case in your bag 不要把你的铅笔盒放进书包
my pencils are in my pencil case.我的铅笔在铅笔盒里.
7，put your pencil case in the bag. 把你的铅笔盒放书包里.
否定句： don't put your pencil case in your bag 不要把你的铅笔盒放进书包
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