She has never done anything for them, they have done everything for her.
#79704
A
when
B
as
C
whereas
D
because
推荐题目
Sometimes, ___ we show our gratitude for a person is reflected in the kind of food we serve him or her．
#30972
A
whether
B
when
C
why
D
how
Studying in groups is necessary_____ you want to do well in school.
#30854
A
if
B
until
C
unless
D
though
The government has taken some measures to solve the shortage of electricity, but it may be some time ____________ the situation improves.
#31321
A
since
B
when
C
unless
D
before