请根据下列句子及汉语注释,写出空缺处单词的正确形式,每空限一词。
It’s very (困难的) to play basketball well.
Jack isn’t tidy. His books are (到处).
I always eat (蔬菜) for dinner.
There are (十二) apples on the desk.
Li Lei is often (迟到的) for school.