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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热门试题

单项选择题People are surprised to learn that ______.

A．Negroes' achievements are not shown in history books.
B．Phillis Wheatley learned English.
C．Negroes are good at mathematics.
D．Negroes have a very long history in America.

单项选择题The word tunnel-versioned (Line 2, Para.4) most probably means ______.

A．narrow-minded
B．blind to the facts
C．short-sighted
D．able to see only one aspect