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
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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
单项选择题
Many people watch the news on television ______ themselves the trouble of reading the newspaper.
A．save
B．to save
C．saving
D．are saving
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