单项选择题

Good research involves (more) merely (gathering) information; (it) is (essentially) a thinking activity.

A．more
B．gathering
C．it
D．essentially
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单项选择题
Birds (whose) coloring blends in with the leaves (do not) seen (as easily as) (those) with brighter feathers.
A．whose
B．do not
C．as easily as
D．those
单项选择题
In (the early) grades, the academic performance of girls (are) equal to (that) of boys in math and (almost) equal to boys in science.
A．the early
B．are
C．that
D．almost
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