This is the very factory ____ we visited last year.
A. that
B. which
C. what
D. the one
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The text is one of the most interesting stories _____ learnt in the past three days.
A. that have
B. that have been
C. which has
D. which has been
The college won't take anyone ____ eyesight is weak.
A. who
B. whose
C. of whom
D. which
Let me think of a proper situation _____ this sentence can be used.
A. where
B. that
C. of whom
D. which
The man _____ you are talking is in the next room.
A. to whom
B. about whom
C. about who
D. whom