单项选择题

I am very sorry ______ you such a lot of trouble by the delayed shipment.

A．caused
B．causing
C．to have caused
D．to be caused
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单项选择题
If you turn to the right at the corner, you ll find a path ______ to the historical building.
A．lead
B．leading
C．to lead
D．leads
单项选择题
The working pattern of Hainan Airlines is similar to ______ of Capital Airlines.
A．that
B．which
C．what
D．whose
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