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【参考答案】

of→to
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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
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
填空题
may→must
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