The professor made his first speech ______ he talked about some subjects the students were interested.
A. that
B. which
C. in which
D. of which
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In the dark street, there wasn't a single person ______ she could turn for help.
A. that
B. who
C. whom
D. to whom
I don't believe the reason ______ he has given for his being late.
A. why
B. that
C. how
D. what
He arrived in New York in 1896, ______ , some time later, he became a writer.
A. when
B. where
C. that
D. which
By using both ears one can tell the direction ______ a sound comes.
A. in which
B. from which
C. with which
D. through which