“Simpler” books are the foundation ______ students build a lifelong habit of reading and further the actual skill of reading for longer and stronger periods of time.
#78488
A
which
B
upon which
C
for which
D
in which
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I shall never forget those days ________ I stayed on the island ________ you visited last week.
#78251
A
when, where
B
which, which
C
when , which
D
which , where
They gave me so much help, without ____ I couldn't have succeeded last year．
#77205
A
them
B
which
C
it
D
that
_____ 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