单项选择题

Only yesterday （） out that my documents were missing.

A．did I find
B．I found
C．I have found
D．Had I found

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单项选择题
By （） your work environment and personal practices, you may be able to reduce fatigue and discomfort.

A．adapt
B．having adapted
C．adapting
D．being adapted
单项选择题
We have advantage （） you in the field of manufacturing electrical products.

A．by
B．over
C．with
D．above
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