–Did you ask the guard what happened?--Yes, he told me all ______ he knew.
#78140
A
about which
B
which
C
that
D
what
推荐题目
(2013·重庆模拟)—When did your brother begin to show his interest in medicine? —It was a Saturday he noticed his classmate experimenting on a frog in the lab.
#75439
A
that
B
what
C
when
D
which
Green tea, many experts suggest, should be drunk regularly to improve health.
#78446
A
which
B
where
C
when
D
as
Parents should see to it _______ their children form the habit of brushing their teeth every day.
#77388
A
this
B
that
C
whether
D
if
(2013·辽宁六校高三联考)Have you ever seen any trees ________ leaves were black because of the polluted air?
#75395
A
whose
B
that
C
which
D
who
Bob is in a hopeless situation, ______ we will keep a very close eye on.
#75927
A
which
B
where
C
that
D
when