根据提示填空(每空一词)
It takes about 20 minutes to go there by bus.(对加粗部分提问)
____ ____ ____ it ____ to go there by bus?
答案
How,long,does,take
知识点:特殊疑问句

对时间“20 minutes”进行提问,要用how long,其后用一般疑问句语序;由于句子的形式主语是it,所以要借助助动词does,动词take用原形。所以正确表达为:How long does it take to go there by bus?

略
