Today E-mails ________ in both cities and countryside because they are much faster and cheaper than letters．
A．are used B．are using C．were used D．were using
科目：初中英語 來源： 題型：
Today E-mails ________ in both cities and countryside because they are much faster and cheaper than letters．
A．a(chǎn)re used B．a(chǎn)re using C．were used D．were using
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