_________(27)
A.in
B.from
C.of
D.with

________(29)
A.in
B.for
C.of
D.by

The word "arguments" in the third paragraph can be best replaced by "_________".
A.viewpoints
B.quarrels
C.rows
D.discussions

According to some experts, the exact number of home-schooled children then must be_______
A.1,700,000
B.1,900,000
C.850
D.1,600,000

The attitude of the author towards home-schooling can be best described as_______
A.unfavorable
B.favorable
C.remarkable
D.acceptable

The word “that” in line 8 refers to________.
A.foveae
B.areas of the eye
C.cones
D.visual distinctions

According to the passage, “bug detectors” are useful for ________.
A.navigation
B.seeing moving objects
C.avoiding bugs when getting food
D.avoiding starvation

According to the passage, why might birds and animals consider humans very visually handicapped?
A.humans can’t see very well in either air or water.
B.human eyes are not as well suited to our needs.
C.the main outstanding feature of human eyes is color vision.
D.human eyes can’t do what their eyes can do.

The phrase “paling into insignificance” is closest in meaning to _____.
A.fading away
B.of less importance
C.without colored light
D.being reduced to little importance

What does the passage mainly discuss?
A.limits of the human eye
B.perfect vision
C.different eyes for different uses
D.eye variation among different species