the speech ( ),a lively discussion started.A being delivered,B be delivered C was delivered D having been delivered.为什么这么选,怎么不是C呢?

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the speech ( ),a lively discussion started.A being delivered,B be delivered C was delivered D having been delivered.为什么这么选,怎么不是C呢?

the speech ( ),a lively discussion started.A being delivered,B be delivered C was delivered D having been delivered.为什么这么选,怎么不是C呢?
the speech ( ),a lively discussion started.
A being delivered,B be delivered C was delivered D having been delivered.
为什么这么选,怎么不是C呢?

the speech ( ),a lively discussion started.A being delivered,B be delivered C was delivered D having been delivered.为什么这么选,怎么不是C呢?
the speech being delivered,是个伴随状语
伴随状语是指状语从句的动作伴随主句发生,它的特点是:它所表达的动作或状态是伴随着句子谓语动词的动作而发生或存在的.
伴随状语一般都是用分词形式.
还有例子,Following its master,the dog entered the room

在此考查点是独立主格结构。
这句话的意思等同于这句 After the speech had been delivered, a lively discussion started.
前后主从部分没了连接词,这时候考虑用逻辑主语 the speech +having been delivered 故选D.

答案是D,因为having done表示的是做完某事之后,相当于after引导的从句。
不是C,因为“,”没有连接两个句子的功能,“,”后面加上and/or/but/so等连词才能加另一个句子。所以不选C

C明显错误。 选C前成为一个句子,后面也是一个句子,但中间没有连词是不可以的。