单项选择题

I suppose you are not serious, ______

A．do I
B．don't I
C．are you
D．aren't you
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单项选择题
Any student who ______ his homework is unlikely to pass the examination.
A．reduces
B．offends
C．practices
D．neglects
单项选择题
Helen was much kinder to her youngest child than she was to the others, ______, of course, made the others jealous.
A．who
B．what
C．that
D．which
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