Cars make our life easier, _________ they bring environment problems.
#56370
A
as
B
or
C
but
D
so
推荐题目
More historical buildings in the old town will fall down ________we try our best to protect them.
#55384
A
if
B
since
C
unless
D
in order that
______ the work is difficult, all the workers are keeping on working .
#58370
A
But
B
Although
C
And
D
So
Someone called me up in the middle of the night, but he hung up ______ I could answer the phone.
#57250
A
if
B
since
C
until
D
before
