Answer:
It would be very hard to move, the trains and/or busses would probably run late because of the amount of people.
If there is way to many people, people may get rowdy and starting getting angry at each other, possibly resulting in someone getting injured.
Answer:
No u can read any book on active voice tooo
Sometimes we need passive voice too .
The plural form of roof is roofs.
Although there are many words where f would become v, like in hooves, this is not one of those cases.
Because the cause of the crisis is many European countries.
The root should be "Mort" and the meaning of that , well its a base to a Latin word wich basically means "Death", hope this helped