单项选择题

A．They are marked with colored labels.
B．They are specially coded.
C．They are checked out.
D．They are inspected by the guar
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单项选择题
A．Admission forms.B．Solar energy.C．Auto maintenance.D．Course requirements for engineers.
A．Admission forms.
B．Solar energy.
C．Auto maintenance.
D．Course requirements for engineers.
单项选择题
A．A carpenter built it for the students.B．A special designer had to make it.C．The drama students had some scenery already.D．The drama students designed and made it.
A．A carpenter built it for the students.
B．A special designer had to make it.
C．The drama students had some scenery already.
D．The drama students designed and made it.
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