His mother looked very tired，for she the house herself all day.
A. had cleaned
B. has been cleaning
C. had been cleaning
D. has cleaned
His mother looked very tired，for she the house herself all day.A. had cleanedB. has been
答案:2 悬赏:60 手机版
解决时间 2021-01-03 20:25
- 提问者网友：人生佛魔见
- 2021-01-02 20:44
最佳答案
- 五星知识达人网友：廢物販賣機
- 2021-01-02 21:34
A. had cleanedB. has been cleaning(答案→)C. had been cleaningD. has cleaned解析：考查完成进行时。根据关键词all day可知应该使用完成进行时。再根据上文的looked可知应该使用过去完成进行时。
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- 1楼网友：怙棘
- 2021-01-02 21:55
回答的不错
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