--- There must be a dozen pens in this house but I can never find one when I need one. --- Keep looking. _____ is sure to turn up.
#16474
A
One
B
It
C
That
D
This
推荐题目
Why not go to see a movie? ---- Because there isn’t _______, I hear.
#57134
A
nothing interesting
B
something interesting
C
anything interesting
D
interesting something
There isn’t ______ in the room.
#57376
A
someone else
B
else someone
C
anyone else
D
else anyone
The children are giving their classroom a good cleaning, ___ are sweeping; ___ are mopping. 
#16994
A
Some…the other
B
Some…others
C
Some…others
D
Some..others