Открыть скобки в праильнои форме This country soon (to depend) upon its coal-mines for fuel, even for domestic purposes. If people (to know) the exact time at which an earthquake was to occur, they (to try) to protect their belongings.
This country soon will depend upon its coal-mines for fuel, even for domestic purposes. If people knew the exact time at which an earthquake was to occur, they would try to protect their belongings.
This country soon will depend upon its coal-mines for fuel, even for domestic purposes.
If people knew the exact time at which an earthquake was to occur, they would try to protect their belongings.