单项选择题

There has been a great increase in retail sales, ______

A．does there
B．isn’’t there
C．hasn’’t there
D．isn’’t it
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单项选择题
His wealth enabled him to______ his passionate interest in art.
A．devote
B．engage
C．pursue
D．register
单项选择题
A．improveB．enhanceC．developD．proceed
A．improve
B．enhance
C．develop
D．proceed
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