单项选择题

A．Cotton.
B．Coffee.
C．Iron.
D．Rubber.
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问答题
1. Ever since early the last century, electricity has become an essential part of our modem life.______________2. If there were no electric power,_______________3. Therefore,____________
单项选择题
A．It was really very cold.B．There was snow all winter.C．It snowed in December.D．The temperature was below zero.
A．It was really very cold.
B．There was snow all winter.
C．It snowed in December.
D．The temperature was below zero.
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