问题
选择题
He stayed there for quite a long time, during ________ time he learned much spoken English.
A．that
B．this
C．which
D．same
答案
答案：C
因前后均的句子，必须要选连词，排除B和D；又因在介词后不能用that来引导定语从句，所以选C。during which time在那段时间里。
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