问题补充：
It is said that many streets in this city have been for cultural protection.
A. left out
B. carried out
C. marked out
D. stood out
答案：
A. left out
B. carried out
(答案→)C. marked out
D. stood out
解析：句意：据说这个城市的许多街道被标志为文化保护。leave out遗漏；carry out执行；mark out标识出；stand out突出。根据句意故选C。
