—It's ninety-nine yuan.
A：How much
B：How many
C：What time
Hello,I'm Bill. I like swimming.This is my father.He likes reading.This is my mother.She likes singing.This is my brother.He likes skating.This is my sister.She likes dancing.What about you?
我喜欢牛奶。可以说：
正常男子体细胞中的染色体只有XY，其中的Y既可以传给其女儿，又可以传给其儿子。
