单项选择题

Louis Brailele designed a form of communication enabling people to______ and preserve their thoughts by incorporating a series of dots which were read by the finger tips.

A．retain
B．visualize
C．convey
D．transfer
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单项选择题
The house______ ready today but there has been a builders' strike it is still only half finished.
A．was to be
B．was to have been
C．were to be
D．should be
单项选择题
Although Oriental ideas of woman' s ______to man prevailed in those days, she did dare to meet with man on equal basis.
A．contribution
B．sacrifice
C．subordination
D．obedience
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