We feel our duty to make our country a better place.
#55871
A
it
B
this
C
that
D
one
推荐题目
–Is ____ your family photo?--Yes,_____ are my parents.
#55833
A
this; this
B
these; this
C
this; these
D
that; that
Scientists are working hard to make _______ possible for people to live on Mars in the future.
#55873
A
it
B
that
C
this
D
one