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(jì)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(guān)系，故用被動語態(tài)，排除D；主語是復(fù)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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