Complete the following sentences as required(根据所给要求，完成下列句子。1-5题每空格限填一词)
They started their discussion about English idioms after the English class .（改为一般疑问句）
_______ they _______ their discussion about English idioms after the English class ?
They are modern agricultural parks.（改为感叹句）
______  ______ agricultural parks they are!
The little boy is so short that he can’t open the door.(保持原句意思不变)
The little boy is _______ short _______ open the door.
My father has been in Shanghai since 1998.(对划线部分提问)
______ ______ has your father been in Shanghai?
encourage   we    keep    pets    to   should    people (连词成句)
____________________________________________.