单项选择题

We regret ______ you that the materials you ordered are out of stock.

A．informing
B．to inform
C．having informed
D．to have informed
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单项选择题
The rain was heavy and ______ the land was flooded.
A．consequently
B．continuously
C．constantly
D．consistently
单项选择题
I hope I ______ my graduation paper by the end of this year.
A．shall finish
B．finish
C．have finished
D．shall have finished
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