单项选择题

The atmosphere is as much a part of the earth as ______ its soils and the water of its lakes, rivers and oceans.

A．are
B．is
C．do
D．has
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单项选择题
Since Helen is angry, we ______.
A．had better leaving her alone
B．should leave her alone
C．might as well leave her alone
D．had rather leave her alone
单项选择题
Mark often attempts to escape ______ whenever he breaks traffic regulations.
A．having been fined
B．to have been fine
C．to be fined
D．being fined
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