单项选择题

A．By asking each other what they see.
B．By looking out of windows.
C．By setting up many experiments.
D．By studying people’s eye’s.
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单项选择题
A．They have different intelligence.B．Different eyesight is one reason.C．Agreement can never be achieved.D．The speaker doesn’t tell.
A．They have different intelligence.
B．Different eyesight is one reason.
C．Agreement can never be achieved.
D．The speaker doesn’t tell.
单项选择题
A．A car running into a woman.B．A policeman stopping a driver to check his ID.C．Traffic congestion.D．4 children crossing the street with no adult’s company.
A．A car running into a woman.
B．A policeman stopping a driver to check his ID.
C．Traffic congestion.
D．4 children crossing the street with no adult’s company.
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