单项选择题

Recent studies show that advertising usually ______ competition and therefore lower prices.

A．nourishes
B．flatters
C．fosters
D．facilitates
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单项选择题
Since her husband lost his job, the hopes of their buying a house have ______ even further.
A．expired
B．receded
C．elapsed
D．terminated
单项选择题
Despite all the policeman's questions the lady continued to ______ that she was innocent.
A．affirm
B．ascertain
C．confirm
D．certify
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