问题
单项选择题
Please note that Items Nos. 1-10 can be Certainly promised for immediate shipment ( ) receipt of your order.
A．if
B．whether
C．at
D．upon
答案
参考答案：D
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Please note that Items Nos. 1-10 can be Certainly promised for immediate shipment ( ) receipt of your order.
A．if
B．whether
C．at
D．upon
参考答案：D