He stayed there for quite a long time during time he learned much spoken English. A. tha

问题补充：

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：

A. that

B. this

(答案→)C. which

D. same

解析：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。