单项选择题

He was hit on the head by a piece of iron and was knocked ______.

A．unconscious
B．subconscious
C．mindless
D．brainless
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单项选择题
I'm afraid that your daughter has failed to get ______ her mid-term exams.
A．by
B．over
C．through
D．out
单项选择题
______ the difficulty of the task, I shall be lucky to complete it by May.
A．Regarding
B．Given
C．Presuming
D．Accepted
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