单项选择题

Unlike photocopies of books, the digital copies are virtually identical in quality to the（）

A. preliminary
B. ingenious
C. initial
D. original

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单项选择题

Although the conditions in which she chooses to live suggested that she is miserly (吝啬的), her contributions to worthwhile charities show that she is （）

A. frugal
B. thrifty
C. generous
D. intolerant

单项选择题

Many countries have adopted systems of （） education in the 20th century in order to promote the average level of education.

A. excellent
B. elaborate
C. complicated
D. compulsory

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