Why did they keep trying _________ they must have known it was hopeless?
#32404
A
if
B
because
C
when
D
whether
推荐题目
The rent is high , ____ the house is quite satisfactory . 
#78584
A
otherwise but
B
but otherwise
C
and otherwise
D
otherwise and
______I went to Guiling,I was fascinated by its natural scenery.
#31800
A
The first time
B
At first
C
At the first time
D
For the first time
I wouldn’t lose courage ______ I should fail ten times.
#31556
A
in order
B
so that
C
even if
D
as if