单项选择题

Often such arguments have the effect of ______ rather than clarifying the issues involved.

A．blocking
B．obscuring
C．tackling
D．prejudicing
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单项选择题
We’’ve just installed two air-conditioners in our apartment, _______should make great differences in our life next summer.
A．which
B．what
C．that
D．they
单项选择题
A．imitateB．adoptC．adaptD．renovate
A．imitate
B．adopt
C．adapt
D．renovate
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