问题
选择题
In some countries, _____ are called “public schools” are not owned by the public.
A．which
B．that
C．as
D．what
答案
答案：D
what引导主语从句，在从句中充当主语，相当于the schools that···。 故选D。
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In some countries, _____ are called “public schools” are not owned by the public.
A．which
B．that
C．as
D．what
答案：D
what引导主语从句，在从句中充当主语，相当于the schools that···。 故选D。