题目内容：

短语填空

1.I was just going out when an old friend _________ _________ (顺便访问) my home.

2.The manager _________ _________ (大动肝火) when he knew Peter’s mistakes.

3.You must _________ an _________ (作出努力) to pass the exam this time.

4.We should _________ _________ (做计划) before doing anything.

5.It’s impolite to _________ others  _________ (让别人等) for a long time.