—There's a piece of paper in it.
Here is a book, but it isn't _________.
朗读诗歌《我们爱你啊,中国》全文,回答问题。
本课中,贯穿全诗的一句话是?
今年小明8岁,爷爷66岁,爷爷比小明大多少岁?