求助大神的解释！

50.       The bank holds $3 billionin loans that are seriously delinquent or in such trouble that [url=]they donot expect payments when[/url]  due.

(A)        they do not expect paymentswhen

(B)       it does not expect paymentswhen it is

[url=](C)        it does not expect payments tobe made when they are[/url]

(D)       payments are not to be expectedto be paid when

(E)        payments are not expected to bepaid when they will be

为什么不能选D呢？