In the street I met the professor_______gave us a talk last week.
#57736
A
what
B
which
C
／
D
who
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--- Look! Lots of people there. What’s wrong?--- An old lady was going across the road ________ a car hit her.
#57346
A
while
B
as
C
whether
D
when
---Let me help you carry the box.---No, thanks. It’s big, __________ there is nothing in it.
#56462
A
and
B
so
C
but
D
because