问题
选择题
The modern history of Italy dates from 1860, ______ the country became united.
A．when
B．if
C．since
D．until
答案
答案：A
A。when 引导的是非限制性定语从句。
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The modern history of Italy dates from 1860, ______ the country became united.
A．when
B．if
C．since
D．until
答案：A
A。when 引导的是非限制性定语从句。