根据句意和提示写出单词。

1.My f     book is The Snow White.

2.We all a     to go to the farm next week.

3.A lot of customers like watching a     at the teahouse.

4.In the end,the captain f     in love with Maria and married her.

5.He read three novels d    his stay in Beijing.

6.The old woman is a     seventy years old,but she can look after herself.

7.Which do you like better,pop or f     music?

甲醚（用X表示）是一种新能源，它燃烧时发生反应：X+3O₂

A．C₂H₆O

B．CH₄O

C．C₂H₄O

D．C₂H₆