Carbon dioxide ___ from burning fuels is the most common of the so-called greenhouse gases.
#4678
A
producing
B
having been produced
C
to be produced
D
produced
推荐题目
With temperature ________ so rapidly, we could not go with the experiment.
#4563
A
fall
B
falling
C
fallen
D
to fall
. When talking about his road to success in an interview, he owed his success ______ his mother.
#4705
A
for
B
in
C
on
D
to
I’d appreciate ____ if you would like to teach me how to use the computer.
#4870
A
that
B
it
C
this
D
you