a答案:The bank holds $3 billion in loans that are seriously delinquent or in such trouble that they do not expect payments when due.我还有个疑问就是OG对a答案得解释里面还说:they do not expect payments when due makes the modification of due unclear.但是我就是觉得due单从语法上讲修饰的很明确阿,就是主句里面的they啊,只有这样才可以省略从句的主语的,虽然逻辑意思不对,比如:when entering the house,they found the dog lying on the ground.这种句子不都是修饰主句主语的吗?og为什莫说不明确呢?难道那个规则不对?请指教,谢谢!