______objects in the distance is made possible with the help of a telescope.A、Ob

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问题 ______objects in the distance is made possible with the help of a telescope.

选项 A、Observation
B、Observatory
C、Observed
D、Observing

答案 D

解析本题考查非谓语动词形式。______object in the distance是句子的主语，而这个短语中object是宾语，所以前面一空应该要填非谓语动词，故A和B排除。因为观察物体是主动行为，所以应该选用现在分词，故答案选D。

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