单项选择题

(Track lighting) is one of the most popular types, (if not) the most popular type, (of) lighting (on market) today.

A．Track lighting
B．if not
C．of
D．on market
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单项选择题
There was (hardly somebody) in the room who paid (any) attention to him (even though) everyone knew (who he was).
A．hardly somebody
B．any
C．even though
D．who he was
单项选择题
In fact, there is perhaps only one human being (in) a thousand who (are) passionately interested in (his) job for the job's (sake).
A．in
B．are
C．his
D．sake
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