1.When he was in his (forties）,he took an active part in the battle against the Qing Dynasty.
2.There are many new (discoveries）in recent years.
3.Spitting in public is (banned）;everybody should have good habits.
4.It's (necessary）for us to master computer technology.
5.(Generally）speaking,different star sings have different characteristics.
6.An old man was found (lying）on the road.
希望能帮到你 O(∩_∩)O~