单项选择题

The old couple were not rich themselves, but they hated to turn away anyone who were（）food and shelter.

A. at the mercy of
B. on the point of
C. with the exception of
D. in need of

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单项选择题
This state research program is made up of two funds,（）could last for two years.

A. the larger one
B. the larger of which
C. the largest one
D. the largest of which
单项选择题
The energy （）by the chain reaction is transformed into heat.

A. transferred
B. released
C. delivered
D. conveyed
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