选择方框内的单词完成下列句子，使句子通顺、正确。每词限用一次。
| A. habit B. away C. serious D. hardly ever E. laugh at F. Luckily |
The naughty boy __________ does his homework, so his teachers are very angry with him.
The teacher is very __________, but he is a good teacher.
It’s a good __________ to get up early and go to bed early.
Don’t __________ others who make mistakes.
The farm is about 20 kilometers __________ from here. You can go there by bus.
__________, I bought the last book that I like in the bookstore.