Нужно изменить всего три слова
Scientists 5) .. (WARN) people in Nepal for decades that an earthquake could cause a lot of damage. As a result, when the 6) (ONE) earthquake tremors hit the country, thousands of buildings and temples 7) (DESTROY) and over 21,000 people were injured​

1.Warned

2.first

3.has been destroyed

explain (объяснять) – explanation (объяснение)

know(знать) – knowledge (знания)

inform(информировать) - information (информация)

progress(развиваться) – progress (развитие)

1.you will never finish your work

2.you continue to do like this

3.i would make it another way+

4.i would leave to america

5.if i haven't come

6.we shouldn't go on refueling