.We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait

.We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait
.We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait

.We ____ for tom at ten last Sunday.He often kept us ______.a.were waiting,waiting b.were waiting,wait c.waited,waiting d.waited,wait
were waiting
waiting
选a
上周日十点我们正在等Tom,他老是让人等.
第一个选项有明显的时间提示,表示过去进行时；而第二个选项则是keep的用法,keep sb.doing表示“让某人处于……的状态中”.

c,前半句中，wait是过去时，后半句中，已有动词kept，不能用wait.