单项选择题

The old worker never made a single mistake in his work and he was praised for his ________ attitude.

A．conscious
B．conservative
C．consequent
D．cautious
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单项选择题
Their English teacher ________ that the students practise reading aloud for one hour every morning.
A．claimed
B．dictated
C．emphasized
D．demanded
单项选择题
He presented a ________ of his model design to the Committee members for their approval.
A．sketch
B．model
C．sample
D．schedule
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