Destruction of the original forest leads to the ___ of many plants.
A. extinction
B. state
C. situation
D. extend
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flocks of的同义词
A. groups of
B. flood of
C. stuck in
D. emergein
Many birds ___ southeast in winter.
A. run
B. fly
C. minima
D. migrate
支持、供养
A. sustain
B. bricks
C. help
D. wander
以...为食
A. eat
B. feed on
C. drink
D. crew