Mr. Smith asked Jenny some new words and let her on the blackboard.A. write them down B.

问题补充：

Mr. Smith asked Jenny some new words and let her on the blackboard.

A. write them down B. write it down C. write down them

答案：

解析：句意：史密斯先生问了詹妮一些生词，并且让她将其写在黑板上。Some new words是复数名词短语，可用them代替，不可用it代替；write…down写下，记下，是一个动词加副词构成的短语动词，代词宾语必须放在两词之间，所以选A。