Our national flag________every morning in Tian An Men Square．A.raisesB.risesC.is raisedD.is rising
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C解析分析：rise(升起；上升；起立)是不及物动词，是指主语自己上升的动作，如：The fiver rose after the heavy rain．而raise(举起，使……升高；提高)是及物动词，必须有宾语，也可以用被动语态，常用下列搭配：raise the flag，raise the price，raise one's voice．本题的意思是“升旗”，flag作主语，是“被升上去的”，所以用raise的被动语态。(延伸)raise还有别的意思，如“饲养”：The farmer raised a lot of hens on his farm．“抚养”：I was raised by my aunt．“筹钱”：Their work is to raise money to help the poor．