__ 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
—         ?—Only £ 5.It is very cheap.
#70690
A
What time is it
B
How many do you want
C
How much is the English book
D
What’s wrong
--- You haven’t been to the West Lake in Hangzhou, have you?---______. How I wish to go there!
#70183
A
Yes, I have
B
Yes, I haven’t
C
No, I have
D
No, I haven’t
—____—They’re English books.
#70433
A
Are these English books?
B
Are those English books?
C
How do you spell it?
D
What’re these in English?