拼写单词根据句子意思，在空格中填写适当的单词，使句子完整、正确。（共8分）
February is the                month of the year.
The box is very light, so I can lift it by            .
I can’t help you          you tell me what’s wrong.
As a citizen, we mustn’t do anything         the law.
Lucy was very         , so she drank two glasses of water.
Susan's parents were disappointed when they knew Susan            the exam.
If I           my father's birthday, please remind me.
The book          to Alice because her name is on it.