——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. 
#16875
A
One
B
It
C
That
D
This
推荐题目
Be quiet! I have ____ to tell you.
#57116
A
important anything
B
anything important
C
important something
D
something important
 It is so difficult a problem that ____ student in this class ____ work it out.
#15173
A
any; can't
B
no; can
C
every; can
D
no; can't
___ is everyone’s duty___ the law.
#16428
A
That; do obey
B
It; to obey
C
That; obeying
D
It; obeying