单项选择题

Color-b1ind people often find it difficult to （）between blue and green.

A．separate
B．distinguish
C．compare
D．contrast

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单项选择题
The policeman stopped him when he was driving home and （）him of speeding.

A．charged
B．accused
C．blamed
D．implied
单项选择题
After the party, the children were allowed to finish off the （）sandwiches and cakes.

A．remained
B．leaving
C．left
D．remaining
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