Add spaces: After10-30minutesdecreasingintoxicationandafteraboutanhournonoticeableintoxicationatall.

Answer: After 10-30 minutes decreasing intoxication and after about an hour no noticeable intoxication at all.

Add spaces: TodayaSpitfireisnotregardedasacomplexfightingaircraft.

Answer: Today a Spitfire is not regarded as a complex fighting aircraft.

Add spaces: Wehadfuninthebus,iseasy,becauseyouwillseemanyinshorttime.

Answer:
We had fun in the bus, is easy, because you will see many in short time.