题目

 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： 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。4．某同学在使用托盘天平时，先把天平放在水平台上，将游码调到零刻度线处，然后调节平衡螺母使横梁平衡．