问题
选择题
—So when did you meet Joan?
—It was last Sunday _______ she came to visit my sister.
A．that
B．since
C．when
D．Before
答案
答案：C
题目分析：考查从句辨析。为避免与第一句重复，答语句尾省略了that I met Joan，答语是一个强调句，强调的是时间状语last Sunday，强调句中包含了一个when引导的定语从句，故选C。