__twice,the postman refused to deliver our letters unless we chained our dog up.a.having bitten b.being bitten c.bitten d.to be bitten 正确答案是c我想问的是如果将a项改为having been bitten的时候.可不可以选a?

__twice,the postman refused to deliver our letters unless we chained our dog up.a.having bitten b.being bitten c.bitten d.to be bitten 正确答案是c我想问的是如果将a项改为having been bitten的时候.可不可以选a? Mary has read the English story twice 改为被动语态 The English stroy __ __ __twice postman are you 后面跟a postman还是the postman When I [] [] the house,the postman [].填空 Look at the postman in the street.Look at the postman in the street. As my father(leave)the house,the postman (arrive) Here() (come) the postman句子适当形式填空 If the postman is 1234567,Tom will be英语智力题, As we were watching TV,the postman arrived.求翻译 the postman sends letters every day变一般疑问句 The postman is thirsty and hungry (改为复数) the postman is Black (对后一个单词提问） The postman sends newpapers _____ me every day. Translate into Chinese:The postman comes every few days. the postman is Black 对后一个单词提问 翻译：the dog was a better postman then l was postman是什么意思?