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

小题1:The naughty boy __________ does his homework, so his teachers are very angry with him.
小题2:The teacher is very __________, but he is a good teacher.
小题3:It’s a good __________ to get up early and go to bed early.
小题4:Don’t __________ others who make mistakes.
小题5:The farm is about 20 kilometers __________ from here. You can go there by bus.
小题6:__________, I bought the last book that I like in the bookstore.