_____ 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
The latest UK official studies show _______fewer teenagers are now studying foreign languages.
#77343
A
what
B
which
C
that
D
Whether
He met a lot of his friends at the party, ______devoted to rural education like him.
#78115
A
many of them
B
many of who
C
many of whom
D
many of which
They said that not all trainees would be suitable for the jobs _____ they were being trained.
#77863
A
in which
B
for which
C
in that
D
for that
Tom's first job was at a local restaurant in his early twenties，________he worked for seven years.
#75556
A
where
B
when
C
which
D
that
There are many kinds of birds in Australia, and over 140 species of snakes, ______are extremely dangerous.
#78399
A
many of those
B
many of that
C
many of which
D
many of what