单项选择题

(Alike) light (waves), microwaves (may be) reflected and (concentrated).（）

A. Alike
B. waves
C. may be
D. concentrated

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She could make a teacher far superior （） the average.

A．than
B．with
C．to
D．as
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The schools （） black children went were simply not good enough.

A．to which
B．to that
C．in which
D．in that
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