Rewrite the following sentences as required（根据要求改写句子。每空格限填一词）
【小题1】She read books in the school library yesterday evening. (改为否定句)
She ________ ________ books in the school library yesterday evening.
【小题2】My father was so busy that he couldn’t help me with my lessons. (保持句意基本不变)
My father was ________ busy ________ help me with my lessons.
【小题3】The man who is fishing by the river is my grandpa. (对划线部分提问)
________ ________ is your grandpa?
【小题4】The Greens will have a picnic the week after the next. (改为反意疑问句)
The Greens will have a picnic the week after the next, ________ ________?
【小题5】a foreign language, useful, it, learn, is, to (连词成句)
_________________________________________________.