客户还款方式一旦确定，就不得变更。（）
参考答案：错
解析：客户可以根据自己的需求和还款能力的变化情况，由借贷双方协商确定。
—— What were you up to when your parents came in?
—— I＿＿＿＿＿for a while and＿＿＿＿＿some reading.
A．was playing； was going to do
B．played； did
C．had played； was going to do
D．had played； did
企业开出的商业承兑汇票，若到期无力付款，应将应付票据转为短期借款。( )
