Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
#15306
A
it; it
B
what; what
C
what; it
D
it; what
推荐题目
Someone is ringing the doorbell．Go and see ________
#14966
A
who is he
B
who he is
C
who is it
D
who it is
— Did a letter come for me this morning? — Yes. _____ came for you.
#15411
A
That
B
It
C
One
D
The letter
The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as of a great number of services.
#16109
A
the one
B
that
C
ones
D
those
I would appreciate _____if you could help me get a ticket in the Peak Transport in the Spring Festival Season.
#16002
A
you
B
that
C
this
D
it