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單項(xiàng)選擇題

Professor Collins was（）of the latest developments in physics because he had been in hospital for several months.

A.unconscious
B.negative
C.robbed
D.ignorant

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單項(xiàng)選擇題

The old man did not seem to attach any importance（）the question.

A.to
B.with
C.towards
D.for

單項(xiàng)選擇題

There is need to check the（）of the report.

A.frequency
B.accuracy
C.emergency
D.efficiency

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