单项选择题

He tried many times to sneak across the border to a neighboring country,() caught each time.

A. having been
B. only to be
C. always being
D. unfortunately

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单项选择题

A．基本知识和基本技能
B．基本普及九年义务教育，基本扫除青壮年文肓
C．基本普及九年义务教育，基本实现素质教育
D．基础知识和基本素质

单项选择题