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U.S. News______rankings of colleges since 1983. They are a very popular resource
U.S. News______rankings of colleges since 1983. They are a very popular resource
游客
2023-10-26
18
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问题
U.S. News______rankings of colleges since 1983. They are a very popular resource for students looking to apply to a university campus. (2018-12)
选项
A、maintains
B、is maintaining
C、maintained
D、has been maintaining
答案
D
解析
动词时态。根据题干中的时间状语since 1983,可知本题使用完成体;现在完成进行体,表示动作或状态从过去某时开始,继续到现在,可能继续下去,(也可能刚刚结束),强调对于现在的影响,带有进行体的持续性、暂时性、未完成性的特点。故本题答案为D。
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