根据句意及所给中文提示或英文解释，写出句中所缺单词，每空限填一个单词。
People like travelling in (春天) because it is neither too hot nor too cold.
—What's your father's (职业)?—He is a doctor.
The 30th Olympic Games will be held in London, the (首都) of England.
Lucy is polite and (乐于助人的). We all like her.
Our maths teacher asked you to go to his office (立即). He is waiting for you.
Colours can change our moods and some may make us feel _ (in need of sleep).
Hurry up, or we can't (arrive at) the railway station on time.
