“征免”栏应填（）。
A．一般征税
B．全免
C．照章征税
D．征免
参考答案：C
My friend Jack is from ______ European country. We all think he is ______ honest boy. [ ]
A. a; a
B. a; an
C. an; an
D. an; a
古音通假的原则是什么？
