下列反应中，氧化剂与还原剂物质的量之比为1：2的是[ ]

A. 3S+6NaOH=2Na₂S+Na₂SO₃+3H₂O

B. 2CH₃COOH+Ca(ClO)₂=2HClO+Ca(CH₃COO)₂

C. I₂+2NaClO₃=2NaIO₃+Cl₂

D. 4HCl(浓) +MnO₂MnCl₂+Cl₂↑+2H₂O

We cannot ______ our offer open for more than three days, so would you please telex your acceptance.

A．have

B．place

C．remain

D．leave