单项选择题

A significant (proportions) of the plants and animals (of) Hawaii exists (nowhere else) in (the world).

A．proportions
B．of
C．nowhere else
D．the world
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单项选择题
Early forms of life on Earth, ______ in absence of oxygen, required other elements.
A．which lived
B．that lived
C．lived
D．were living
单项选择题
You should ask ______ your parent's opinions about this matter.
A．after
B．to
C．with
D．of
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