根据句子意思，用括号中所给单词的适当形式填空。（每空不限一词）
Everyone likes the girl’s     eyes. (smile)
   (luck), he didn’t hurt badly.
I look thin, but he looks even     (thin).
Please get up      (quick), or you’ll be late for school.
My best friend has a good sense of     (humorous).
How many      (shelf) are there in your study ?
Which is     , a car or a bike? (useful)