单项选择题

A flashing red light ______ motorists to trouble ahead.

[A] reminded
[B] alerted
[C] warned
[D] cautioned

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单项选择题

The divorced mother would have her own family, in which his position as an______ stepson and his education would not be good.

[A] illicit
[B] illegal
[C] illegitimate
[D] illegible

单项选择题

Some treasures are not immediately recognizable ______.

[A] as such
[B] such as
[C] as that
[D] so that

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