People______keep in touch with their friends by ____letters.如题 A.is used to ,/ B.used to,writing C.was used to ,write D.use to,to write

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People______keep in touch with their friends by ____letters.如题 A.is used to ,/ B.used to,writing C.was used to ,write D.use to,to write

People______keep in touch with their friends by ____letters.如题 A.is used to ,/ B.used to,writing C.was used to ,write D.use to,to write
People______keep in touch with their friends by ____letters.如题
A.is used to ,/ B.used to,writing C.was used to ,write D.use to,to write

People______keep in touch with their friends by ____letters.如题 A.is used to ,/ B.used to,writing C.was used to ,write D.use to,to write
B

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