time passed however the carnival period was extended.A. AsB. whenC. whileD. since

问题补充：

time passed, however, the carnival period was extended.

A. As

B. when

C. while

D. since

答案：

(答案→)A. As

B. when

C. while

D. since

解析：考查连词：句意：然而，随着时间的推移，狂欢节的时间被延长了。As随着，when当…时候（表示时间点），while当…时候（表示一段时间），since自从，既然，选A。