Ex.1
If they planned the robbery better, they would succeed.
If the police acted more quickly, they would prevent the robbery.
If he didn't drive so fast, he wouldn't have an accident.
The crime rate wouldn't increase if the last government's policy was more efficient.
The police wouldn't catch him if he didn't leave his fingerprints on the door.
Ex.2
If the police didn't act decisively, the criminal would escape.
if the police acted decisively, the criminal wouldn't escape.
If the police didn't apologize, Mr. Weskley wouldn't be satisfied.
If the robber forgot to take a map, he would get lost.
If the thief didn't run fast, the police would catch him.
If the court released the prisoner early, he would injure two police officers.
Ex.3 - не точно
1. If the man gave them a packet of sweets to eat during the journey, they would start fighting and one of the children would begin to choke on the sweets.
2. If the child couldn't breath and was in difficulties, the driver would turn round to help and would lose control of the car.
3. If it crashed into a group of people sitting at tables outside a cafe, five people would be injured, two seriously.
Объяснение:
Yuri Gagarin flew into space in 1961. The rocket was called "Vostok-1". Дальше сам дадумывай