单项选择题

According to the passage what is unknown to many people is that______

A．the drip cup benefited light industry.
B．the truth about carver was twisted or concealed.
C．sugar-refining owes a lot to a Negro.
D．a Negro invented the frying pan.

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单项选择题

The main rivers parting in Britain run from______

A．north to south
B．south to north
C．east to west
D．west to east

单项选择题

Which of the following statements is true

A．That Negroes were docile was denied by the slaveholders.
B．That Negroes were docile Was not quite true.
C．That Negroes were docile was a lie fostered by their masters.
D．That Negroes were docile was sheer nonsens