单项选择题

If you can ______ punctual delivery, we shall place large orders with you.

A．guarantee
B．convince
C．assure
D．ensure
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单项选择题
Because he is busy making money now, he is ______ of new developments in his original field.
A．ignorant
B．innocent
C．illiterate
D．negligent
单项选择题
She gave him back the money she'd stolen for ______ sake.
A．consent
B．conscience' s
C．her
D．conscious'
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