Bruce:WhendidRogerchangehisjob?　　Laura:Hehasntchangedhi...

问题详情：

Bruce: When did Roger change his job?

Laura: He hasnt changed his job. He still works in the same computer store.

Bruce: But I saw him ______ watches on the street cornet.

           sell            sold          ing

【回答】

D

知识点：动词和动词短语

题型：选择题