下列分类方法正确的是（ ）
A：塑料、合金﹣﹣﹣合成材料
B：洁净的空气、高锰酸钾﹣﹣﹣混合物
C：豆浆、雪碧﹣﹣﹣溶液
D：煤、天然气﹣﹣﹣化石燃料
写出下列单词、句子的中文意思。
①ball____②balloon____③boat____
④doll____⑤car____⑥kite____
Problems in 2050
What happened when Lily came back to her room?
What was Mike doing at 11: 30 a. m. the day before yesterday?
What was wrong with Mike's fridge that day?
Why could Benny's father's car not work?
你的介绍可以这样开始: Lily was staying at the Hotel Whale last week…
下列三个数：a=ln32-32，b=lnπ﹣π，c=ln3﹣3，大小顺序正确的是（ ）
