–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
When the audience heard the alarm, they all hurried to they thought was an emergency exit door.
#78503
A
what
B
which
C
where
D
who
A good advertisement, _____ people attach positive meanings, can contribute to the sales of a product．
#78507
A
for which
B
to which
C
of which
D
on which
Copernicus’s theory is now the basis ______ all our ideas of the universe are built.
#77771
A
to which
B
on which
C
for which
D
by which
The air quality in our city, _____is shown in the report, has improved a lot recently.
#77049
A
that
B
what
C
where
D
as