MumtriedtopersuadeDadnottosmoke,buthejust

问题详情：

 Mum tried to persuade Dad not to smoke, but he just ______ listen.

A. wouldn't                 B. couldn't                    C. shouldn't                  D. mustn't

【回答】

A  

知识点：虚拟语气与情态动词

题型：选择题