----- The opening ceremony has already started.
------Look! The flag is now.
A. risen
B. raising
C. being raised
D. being rose
网友回答
A. risen
B. raising
(答案→)C. being raised
D. being rose
解析：考查现在进行时的被动，和动词辨析：句意：--开幕式已经开始了。看！旗帜正在被升起。Raise是及物动词，rise、是不及物动词，不能用被动。选C。