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Don’t stop working _____ twelve. 
#58157
A
to
B
at
C
when
D
until
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Hurry, _____ we shall be late for school.
#56491
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and
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or
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Mr. Black is rich, ________ he is not happy.
#55494
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and
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#56917
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after
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if
He won’t join in the party. I won’t, _________.
#57283
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yet
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—Dongdong, ____ toy car is that?         —It’s ____.
#56279
A
who’s; hers
B
whose; mine
C
whose; her
D
who’s; my