Mr. Black is rich, ________ he is not happy.
#55494
A
and
B
or
C
but
D
不填
推荐题目
Yesterday morning I was just leaving_______ the telephone rang.
#55954
A
when
B
while
C
because
D
since
Stephen Hawking can’t walk or even speak,_____he has become very successful.
#58267
A
but
B
and
C
or
D
then
