单项选择题


A．knew
B．saw
C．were
D．was
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单项选择题
While (remembering) mainly (for) the invention of the telephone, Alexander Graham Bell devoted his life (to) (helping the deaf).
A．remembering
B．for
C．to
D．helping the deaf
单项选择题
The reason (that) (many of homemakers) buy kitchen appliances (厨房用品 ) is (that) they want to do their tasks (in a shorter length of time).
A．that
B．many of homemakers
C．that
D．in a shorter length of time
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