Although the Supreme Court ruled as long ago as 1880 that Blacks could not be excluded outright from jury service, nearly a century of case-by-case adjudication has been necessary to develop and enforce the principle that all juries must be drawn from “a fair cross section of the community.” a. … b. was necessary for developing and enforcing the principle of all juries being
1 nearly a cerntury是一个时间的延续，所以要用现在完成时态，b用was错； 2 sth. be necessary to do是习惯用法，用for一般：it is necessary for sb. to do; 3 principle用that修饰，意思更清晰； 4 being 的用法累赘，而且A中情态动词must不能随便省略；
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发表于 2003-7-11 13:31:00
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