He stayed there for quite a long time, during ________ time he learned much spoken English.
A. that B. this C. which D. same
He stayed there for quite a long time, during ________ time he learned much spoken English.
A. that B. this C. which D. same
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。