Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate answer choice for each blank.
下面的文本有一些空格。点击每个空格会出现一组选项，请为每个空格选出最合适的答案。
Benjamin Banneker has been called the first African American intellectual. Self-taught, after studying the inner workings of a friend's watch, he made one of wood that accurately time for more than 40 years. Banneker taught himself astronomy well enough to correctly a solar eclipse in 1789. Also a surveyor and mathematician, Banneker was appointed by President George Washington to the District of Columbia Commission, which was responsible for the survey work that established the city's original . When the chairman of the committee, Pierre Charles L'Enfant, suddenly resigned and left, taking the plans with him, Banneker the plans from memory, saving valuable time.
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