_____ in the library regulations that any book borrowed be returned by due time, or the borrower will be fined．
#78012
A
What is required
B
It is required
C
As is required
D
Which is required
推荐题目
Would you be kind enough to help the boy _____ Chinese is really hard to learn?
#78011
A
who
B
whose
C
for whom
D
from whom
(2013·正定中学二次月考)Some passersby witnessed the car accident ________ five passengers were killed，a baby included.
#75630
A
in which
B
which
C
that
D
in that
He constantly gets into awkward and absurd situations, ____ audience can be greatly amused.
#77180
A
which
B
where
C
that
D
what