i have cleaned the door twice（对画线部分提问划线部分：twice)_____ ______ ____英语解答

i have cleaned the door twice（对画线部分提问划线部分：twice)
_____ ______ _____ you _______the door?

人气：147 ℃　时间：2020-09-08 21:31:04

解答

How often have ...cleaned.
前面如果是四个空（这个比较好）
How many times have ...cleaned