阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或者括号中词语的正确形式填空。
Diana Jacobs thought her family had __1__ workable （可使用的） plan to pay for college for her 21－year－old twin sons： a combination of savings， income， scholarships， and a modest amount of borrowing． Then her husband lost his job，__2__the plan fell apart．
