Many people shop on line, ________ years ago, they bought things only from stores.
#57509
A
and
B
so
C
but
D
or
推荐题目
The cost of living in Chengdu is among the lowest in China, ________ the quality of life is probably one of the highest.
#56003
A
since
B
when
C
as
D
while
Susan was reading a newspaper on the train_________ a strange old man come over.
#55968
A
when
B
while
C
before
D
after
