Question

【题目】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

Answer 1

【答案】C

【解析】

试题分析：考查固定句型和非谓语动词。句意：因为光污染，星光太微弱了以至于在市区无法用肉眼看到(它们)。too...to...太......以至于......，stars和observe是动宾关系，即星星被观察到，应该用被动语态，故选C。