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.
