题目内容
Alexander Graham Bell invented _____ telephone in 1876, ______communication
between people has been much easier.
A. /;since which time B.a; since when
C.the; since when D.the; since which
C
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题目内容
Alexander Graham Bell invented _____ telephone in 1876, ______communication
between people has been much easier.
A. /;since which time B.a; since when
C.the; since when D.the; since which
C