单项选择题

The children were ______ in observing the busying ants on the ground, not hearing the calls of their mother.

A．submerged
B．immersed
C．drowned
D．dipped
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单项选择题
The committee tried to wave aside these problems as ______ side effects of the progress.
A．versatile
B．trivial
C．preliminary
D．alternate
单项选择题
Frequent praise made the young man so conceited that he thought himself ______ in his position.
A．inaccessible
B．irresponsible
C．irremediable
D．irreplaceable
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