单项选择题

A．Two days.
B．Three lays.
C．Four days.
D．A week.
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单项选择题
A．Neither of the two national exams is compulsory.B．Either of the two national exams is compulsory.C．Both of the two national exams are compulsory.D．They are not required by any school in the United States.
A．Neither of the two national exams is compulsory.
B．Either of the two national exams is compulsory.
C．Both of the two national exams are compulsory.
D．They are not required by any school in the United States.
单项选择题
A．From parents.B．From PE classes.C．From health classes.D．All of the abov
A．From parents.
B．From PE classes.
C．From health classes.
D．All of the abov
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