__ is really hard __ them to climb Mount Tai.
#69186
A
This, to
B
It, to
C
This, for
D
It, for
推荐题目
My father seldom has sports in the early morning,________?
#70799
A
has he
B
hasn’t he
C
does he
D
doesn’t he
—Will you please _______ the flowers? —Sorry. I won’t.
#71089
A
pick
B
don’t pick
C
not to pick
D
not pick
— You didn’t use to play tennis, ______? — Yes. I still like playing tennis now.
#70829
A
didn’t you
B
did you
C
weren’t you
D
were you