In a sports team each player has a clear role,and there are few occasions ________members are confused or uncertain about their roles. 
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A
whose
B
that
C
when
D
which
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Peter has many friends,______can help him . 
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A
few of which
B
few of whom
C
few of that
D
few of them
The students ________ are expected to pass.
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A
were taught by Professor Deacon
B
whom were taught by Professor Deacon
C
when were taught by Professor Deacon
D
Professor Deacon taught