Work hard at your lessons, ______ you’ll fail the exams again.
#30943
A
and
B
but
C
otherwise
D
besides
推荐题目
Mary must keep her mind on her medical studies now, so it would be years ______ she could think about marriage.
#32683
A
before
B
when
C
since
D
until
He told me that he would remember the days in Beijing University forever____ he got much help there from Professor Zhu.
#34614
A
where
B
which
C
that
D
when
_______ her parents were strongly against it, she married the young man.
#34244
A
For
B
If
C
Since
D
While