—Excuse me.Did you notice whether the No.108 Bus had gone by?
—Not I’ve been standing here.
A. as
B. when
C. since
D. while
网友回答
A. as
B. when
C. since
(答案→)D. while
解析：将此句补全应为：The No.108 Bus hasn’t gone by while I have been standing here.意为：我在这儿站着期间，108路车没过去。