【題目】Due to the light pollution, stars are too faint _________with naked eyes in the urban area.

A. observing B. being observed

C. to be observed D. to be observing

【答案】C

【解析】

試題分析:考查固定句型和非謂語動(dòng)詞。句意:因?yàn)楣馕廴,星光太微弱了以至于在市區(qū)無法用肉眼看到(它們)。too...to...太......以至于......,stars和observe是動(dòng)賓關(guān)系,即星星被觀察到,應(yīng)該用被動(dòng)語態(tài),故選C。

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