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Some bat caves, like honeybee hives, have residents that [#permalink]
08 Feb 2006, 09:32
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Some bat caves, like honeybee hives, have residents that take on different duties such as defending the
entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the
cave for new food and roosting sites.
(A) acting as sentinels and to sound
(B) acting as sentinels and sounding
(C) to act as sentinels and sound
(D) to act as sentinels and to sound
(E) to act as a sentinel sounding