单项选择题

______ can customers' money be refunded.

A．Under some circumstances
B．Under any circumstances
C．Under no circumstances
D．Under all circumstances

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单项选择题

His failure to pay his debts ______ their suspicion that he was not to be trusted.

A．convinced
B．confirmed
C．checked
D．tested

单项选择题

The chairman's proposal is that we ______ the question.

A．should discuss
B．discuss
C．would discuss
D．had discussed

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