This is the worker________．A.we often talk about himB.we often talkC.about whom we often talkD.about that we often talk
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C解析分析：用恢复成两句的办法：This is the worker．We often talk about him．(him就是the worker)第二句做定语从句，要把him改为引出词，除了whom we often talk about／that we often talk about／we often talk about三种以外，还有about whom we talk(可以把介词about放到引出词的前面，但此时只能用whom，不能用that．)A项的him没有变引出词。B项少了about．D项介词about后面用引出词that．