单项选择题


A．it
B．what
C．this
D．which
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单项选择题
A．won'tB．shan'tC．don'tD．haven't
A．won't
B．shan't
C．don't
D．haven't
单项选择题
A．madeB．attainedC．containedD．sustained
A．made
B．attained
C．contained
D．sustained
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