工程质量保修自（）之日起计算。
A.提交竣工验收报告
B.竣工结算
C.竣工验收合格
D.工程交付使用
参考答案：C
--- Where is your mother?
--- She _______ to Sichuan on business. She has ______ there four times recently.
A．has gone, gone
B．has been, been
C．has gone, been
D．has been, gone
加工贸易保税料件及成品经批准内销的，仍按原进口料件归类，但生产加工所产生的边角料应按内销时的状态确定归类。 ( )
