单项选择题

Metals we found in the earth ______ iron, lead and copper.

A．includes
B．contains
C．comprises
D．constitutes
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单项选择题
We object to the idea that it is military force that should be ______ in settling international disputes.
A．applied to
B．resorted to
C．fallen back on
D．restrained from
单项选择题
A doctor's obligation when he can no longer ______ the approach of death is to make the patient comfortable, including easing his pain.
A．hang around
B．hang on
C．hold back
D．hold on
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