单项选择题

A．what
B．as
C．those
D．which
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单项选择题
A．She hasn’t been doing much of the reading.B．She understood the reading last night.C．She isn’t having much trouble.D．She understands very little.
A．She hasn’t been doing much of the reading.
B．She understood the reading last night.
C．She isn’t having much trouble.
D．She understands very little.
单项选择题
A．Nature has changed our environment over the years.B．We must avoid wasting resources and polluting our environment.C．Our resources are nearly used up.D．Trips to other planets will help eliminate pollution.
A．Nature has changed our environment over the years.
B．We must avoid wasting resources and polluting our environment.
C．Our resources are nearly used up.
D．Trips to other planets will help eliminate pollution.
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