Вставить(1.5 Complete the sentences using one of these verbs: get change

Вставить
(1.5 Complete the sentences using one of these verbs: get change rise fall increase
You don't have to use all the verbs and you can use a verb more than once.)
1. The population of the world is rising very fast.
2. Ken is still ill but he _____________better slowly.
3. The world _____________. Things never stay the same.
4. The cost of living _____________. Every year things are more expensive.
5. The economic situation is already very bad and it _____________ worse.