It is appropriate that some time______thorough study of the results of the Apollo mission.

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问题 It is appropriate that some time______thorough study of the results of the Apollo mission.

选项 A、devotes to
B、devoted to
C、is devoted to
D、be devoted to

答案D

解析 本题考查虚拟语气的用法。句意:花一些时间对阿波罗计划的结果做详细的研究是恰当的。本题是虚拟语气用于主语从句,在“It is/was+形容词+that+主语从句”的结构中,主语从句的谓语动词用“(should+)动词原形”。本题的形容词是appropriate(恰当的),且此处表示被动,故选D。
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