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"The door is open.Could you have forgotten to lock the door?

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"The door is open.Could you have forgotten to lock the door?" "Yes,I_"
A could B could have C might have not D can not have
为什么选B?求详解
回答语完整的是：Yes ,I could have forgotten to lock the door.因为这句子里的谓语有两个助动词could have ,所以不能省略成Yes ,i could.这样会产生歧义,因为这样可以理解这句是I could forget to lock the door,与原句不符.
所以这种有两个助动词的谓语的省略应该省略到第二个助动词.
C和D两个答案与前一句不搭配,不一致.
"The door is open.Could you have forgotten to lock the door? have to lock the door before leaving Of course you () The door is open.I have forgotten ____(open)it.适当形式填空 could you please open the door The door is ______(lock) I have to ____ the door open The notion that she had forgotten to lock the front door obs this is the ( )to your door .you can open the door 中间的空空怎么填 the door ____ lock leave,remember,lock,the,to,when,door,you. Could you take____ to clean the door? could you please open the door?改为否定句