单项选择题

Though the long-term（）cannot be predicted, the project has been approved by the committee.

A、affect
B、effort
C、effect
D、afford

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单项选择题

When Mr. Johns get old, he will（）over his business to his son.

A、take
B、hand
C、think
D、get

单项选择题

Colour - blind people often find it difficult to（）between blue and green.

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

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