________ its historic task, Mir space station fell into unpopulated South Pacific area as ________ on March 23,2001.A.To end; expectedB.Having ended; expectingC.Ending; to be expectedD.Ending expected
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D解析此题考查有关非谓语形式在句中的作用，第一空用 Ending，表示和平号宇宙空间站结束了它的历史使命，第二空用 expected构成“as expected ＝ as it had been expected” 短语，表示“正如预期的那样”。