单项选择题

All flights ( ) bemuse of the snowstorm, we decided to go by sea.

A．were canceled
B．having canceled
C．having been canceled
D．had been canceled
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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
单项选择题
The project will ( ) the city's telephone network to cover 1 000 000 users.
A．extend
B．expand
C．lengthen
D．enlarge
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