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        1. Bikes ______ in the 1880s and they ______ traveling around.
          A.were invented; were used as
          B.were invented; are used for
          C.was invented; was used for
          D.invented; are used to
          B
          考查被動語態(tài)。句意“自行車是在十九世紀八十年代發(fā)明的,它們被用來進行旅游觀光。”bike和invent之間是被動關系,故用被動語態(tài),排除D;主語是復數(shù),排除C;be used as“被用作......”;be used for doing sth.“被用來做某事”。故選B。
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