单项选择题

The water came in （） bursts of hot and cold.

A．alternate
B．alternative
C．reciprocal
D．mutual

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单项选择题
Our football team is（）with one from the next town for the championship.

A．confronting
B．contriving
C．contending
D．converging
单项选择题
His book has been taken out of （）

A．circulation
B．circuit
C．circumference
D．circumstance
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