单项选择题

A．$50.
B．$30.
C．$20.
D．$10.
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单项选择题
A．The underground oil resources have not been affected.B．The underground water resources have not been polluted.C．The oil lakes soon dried up and stopped evaporating.D．Most of the desert animals and plants have managed to survive.
A．The underground oil resources have not been affected.
B．The underground water resources have not been polluted.
C．The oil lakes soon dried up and stopped evaporating.
D．Most of the desert animals and plants have managed to survive.
单项选择题
A．Clean her house while she is away.B．Buy her some plants and take care of them.C．Water her plants while she is away.D．Water her plants when he is not at work.
A．Clean her house while she is away.
B．Buy her some plants and take care of them.
C．Water her plants while she is away.
D．Water her plants when he is not at work.
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