The visitors stood at the top of the mountain east of the city watching burning sun ris

问题补充：

The visitors stood at the top of the mountain east of the city, watching burning sun rising.

A. the; a

B. \; the

C. the; the

D. \; a

答案：

A. the; a

B. \; the

C. the; the

(答案→)D. \; a

解析：考查冠词：句意：游客站在城市东边的山顶，看着看着红火的太阳升起。第一个空不要填，因为这里的east用作形容词，作名词mountain的后置定语。第二个空应该填不定冠词a.这里sun前面有定语，所以应该加不定冠词；如果没有定语，则应该加定冠词the.选D。