1.thebankercustomerrelationshipisthatofdebtorandcreditor--whoiswhichdependingonwhetherthecustomer'saccountisincreditorisoverdrawn.这里为什么用depending,而不是depends或者isdepending最后的isoverdrawn里is

Question

1.the banker customer relationship is that of debtor and creditor-- who is which depending on whether the customer's account is in credit or is overdrawn.这里为什么用depending,而不是 depends 或者 is depending 最后的 is overdrawn 里 is能不能省略
2 the question became one of whether man could control the disease he had invented.这里 为什么用 one of 而不是 that 或者 one that

Answer 1

1.(the banker customer relationship) is (that of debtor and creditor)[that指代relationship]--
who is which
(depending on (whether the customer's account is in credit or is overdrawn)).
这里的which并没有引导一个从句,而只是代词.depending动名词短语作为which的补足语.
overdrawn前加is是为了明确表明其前面没有in,避免or并列引起的歧义.
2 the question became one of whether man could control the disease he had invented.
我认为,用that替代one of也说得通,用one that则非常不顺了.
没有上下文可供参考,只能估计.