单项选择题

How pleased the detective was ______ what his customer told him!

A．hearing
B．to hear
C．heard
D．to hearing
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单项选择题
______ rapidly by the body, sugar provides a quick energy source.
A．Digested
B．Digesting
C．To digest
D．Having digested
单项选择题
They soon realized that, ______ , the situation would get worse.
A．unless dealing with carefully
B．if not carefully dealing with
C．unless carefully dealt with
D．if dealt not carefully with
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