__ 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
It’s wise _______ you _______ your child at home alone while it’s also very important _______ him to learn to protect himself.
#70227
A
of, to leave, of
B
of, to leave, for
C
for, leave, for
D
for, leave, of
—Look！That 2-year-old girl can sing English songs. —________ clever girl!
#69158
A
What
B
What a
C
How
D
How a
--There is no juice in the fridge, _____? --No, we’d better go and buy some.
#69666
A
is there
B
isn’t there
C
is it
D
isn’t it