I, who _____ your friend, will try my best to help you.
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The size of the audience, _____ we had expected, was well over 1600.
A. as
B. that
C. which
D. who
They have started an investigation, _____ are being kept secret.
A. whose detail
B. whose the details
C. the details of which
D. the detail of it
Have you ever asked him the reason _____ may explain his absence?
A. why
B. for which
C. which
D. what
Mr Seal has changed a lot, and many of his friends say that he is not the same man _____.
A. like he was
B. as he used to be
C. as he was used to
D. like what he was