Every time Ashtita tries to break a record, he reaches a point ______ he feels he cannot physically do any more．
#75753
A
where
B
that
C
when
D
which
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I can think of many cases ______students obviously know a lot of English words and expressions but couldn’t write a good essay .
#77369
A
why
B
which
C
as
D
where
_____ 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