单项选择题

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

A．separate
B．compare
C．distinguish
D．contrast
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单项选择题
The nurse ______ the doctor in the operation room.
A．insisted
B．resisted
C．assisted
D．persisted
单项选择题
The terrible noise is ______ me mad.
A．turning
B．setting
C．driving
D．putting
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