______ takes a lot of concentration and a great sense of balance to stay on it.
#14636
A
It
B
This
C
What
D
That
推荐题目
Clothing made of man-made materials has advantage over _________ made of natural ones like cotton, wool or silk.
#15150
A
one
B
it
C
that
D
the ones
— Which would you like, Mary, tea or coffee?— ________ is OK. I am thirsty now.
#57890
A
Neither
B
None
C
Any
D
Either
_______is certain ______ the Normans conquered England in 1066 and then English changed.
#15737
A
That; that
B
It; what
C
That; what
D
It; that