下列歌词中不是病句的一项是（    ）

一堆沙土重 $\frac{15}{16}$ 吨，用去了 $\frac{2}{5}$ ，还剩____吨。

栀子花开，香气四溢，此现象说明（　　）​

生活处处有物理，留心观察皆学问． 厨房中也包含着很多物理知识．如：抽油烟机在工作时，由于转动的扇叶处气体的流速大，压强____，（大/小）从而在周围大气压的作用下将油烟压向扇口排出．抽油烟机工作时主要将____转化为____．

根据短文内容，选择正确答案。
B
    Nick is my pen pal. He is 12 years old. He is from Canada. He lives in Ottawa. He speaks English and French. His favorite subject is science. He likes Chinese, too. And he says he can speak a little Chinese, but he can't write in Chinese.
    Nick likes sports, too. He likes swimming best. He goes swimming on weekends with his father. He says he can swim very well. He doesn't like physics. He thinks it's too difficult.
    Nick has a big family. There are nine people in his family, his grandpa, grandma, father, mother and his brothers and sisters. He has two brothers and two sisters. They are Bob, Tim, Jane and Susan. They are happy!