她正要离开时电话响了。

She was ___at ___the ___point ___of leaving when the phone rang.

警方正要逮捕嫌疑人时他逃跑了。

The police were ___on ___the ___point ___of arresting the suspect when he fled.

他快要完成作业了，所以现在不能玩。

He is ___at ___the ___point ___of finishing his homework, so he can't play now.