交易商协会初评完成后一般要求企业或者中介机构在（）个工作日内提交补充材料。
A.10
B.15
C.20
D.25
参考答案：A
用竖式计算，并验算．
343×86 82.8÷0.23．
--______ did you stay in the Marco Polo Hotel?
--About one week. We enjoyed our stay there.
A．How many
B．How much
C．How often
D．How long
