Question

9. His mother               outside for half an hour to punish him for his dropping out of class. (keep)

因为逃课，他妈妈让他在外面站了半个小时作为惩罚。

Answer 1

9. kept him standing考查keep启的复合宾语的用法。keep sb. doing中doing为him的宾语补足语， 表状态。