单项选择题

A．She may need to take another course.
B．The math course is too short.
C．The graduation date has been changed.
D．She should have gotten a better scor
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单项选择题
A．Travel by river is more expensive than taking a wagon over country roads.B．If there were not enough rivers, people there built shallow canals.C．Crops from New York were sent to Atlantic ports through the Great Lakes.D．The Erie Canal was built to connect New York with the mouth of the Hudson.
A．Travel by river is more expensive than taking a wagon over country roads.
B．If there were not enough rivers, people there built shallow canals.
C．Crops from New York were sent to Atlantic ports through the Great Lakes.
D．The Erie Canal was built to connect New York with the mouth of the Hudson.
单项选择题
A．A moth’s nervous system is very sensitive to light.B．Light makes the moth reduce the movements of its wings.C．When the wing on one side slows down, the moth will turn to this side.D．Light attracts the moth and makes it continually turn near the light.
A．A moth’s nervous system is very sensitive to light.
B．Light makes the moth reduce the movements of its wings.
C．When the wing on one side slows down, the moth will turn to this side.
D．Light attracts the moth and makes it continually turn near the light.
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