问题
Scientists are working hard to make _______ possible for people to live on Mars in the future.
A:it
B:that
C:this
D:one
B:that
C:this
D:one
正确答案是：
同类题型
Is this ______ dictionary?—No, ______ isn’t. It’s ______ dictionary.
__________is the train station from this shopping mall, do you know?—- About 30 minutes by bus.
The time is drawing near_____food raised in space will directly benefit humans below.
Does he have a soccer?—No, he.
What does Mrs Li teach? —-She is______ English teacher, and she teaches ______ English very well.