18. Complete o texto com as formas apropriadas do verbo to be:
Once upon a time, there_______ people who liked to talk to each other using an uncommon mean of communication: the voice. They_______ very strange because the voice ________ a commom way to communicate, people just don't use it. There _______ many ways to communicate now: internet, brain waves, writing, but the voice______ commom only when talking to someone in person.
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Are; are; is; are; is
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