单项选择题

I was （）in my reading, and didn't at first hear the doorbell ring.

A．immured
B．immersed
C．busy
D．infatuated

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They made detailed investigations to （）themselves with the needs of the rural market.

A．adhere
B．acknowledge
C．acquaint
D．activate
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We are writing to the manager （）the repairs recently carried out at the above address.

A．with the exception of
B．with the purpose of
C．with reference to
D．with a view to
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