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单项选择题


A．since
B．so
C．while
D．for
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热门试题

单项选择题A．adult'sB．teacher'sC．scientist'sD．student's

A．adult's
B．teacher's
C．scientist's
D．student's

单项选择题A．excessiveB．extraC．additionalD．added

A．excessive
B．extra
C．additional
D．added