we are watching TV in the sitting room ()my mother is cooking dinnera.after b.before c.when d.while
问题描述:
we are watching TV in the sitting room ()my mother is cooking dinner
a.after b.before c.when d.while
答
D while 在这里可以翻译在而 ,表对比
答
when
答
when
表示两者动作都在进行中