Mr Black has two sons, one of ________working as a doctor.
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A
them
B
who
C
whom
D
whose
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With the school rules _____ by the students, the school has taken on a new look.
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A
respected
B
respect
C
were respected
D
respecting
 The project__________, my colleagues and I had a party to celebrate it.
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A
completed
B
was completed
C
had completed
D
completing
__________ , we'll come to see you again.
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A
If time will permit
B
Time permits
C
Time permitting
D
Time permited