why did you keep your brother___(wait)for a long time yesterday

问题描述:

why did you keep your brother___(wait)for a long time yesterday
为什么填waiting
不是keep sb do sth?
有没有keep sb do sth 这一说?

应该是keep sb doing ,意为使某人一直做某事
keep sb to do 是让某人放下手头的转而去做谋事
无keep sb.do