单项选择题

It is (largely) through perspiration, (or) the evaporation of water (through) the pores, that humans(rid them) of excess moisture.

A．largely
B．or
C．through
D．rid them
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单项选择题
Unless (they are so permitted) by the attending (physician), no visitors or relatives (can) enter, the (patient's) room
A．they are so permitted
B．physician
C．can
D．patient's
单项选择题
Due in large part to the complexity of its structure--over two hundred bones ______ together by ligaments--the human skeleton is a marvel of architectural construction.
A．binding
B．bound
C．bounded
D．bind
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